Database Develop

Urgent help about the battery

I posted this question before, but no one answered. But this problem drives me crazy!
My Kaiser turned off when the battery was running out.
When I connect wall power to charge it, the orange LED indicates it was charging, but just few seconds later it automatically boot, and the orange LED was off.
The problem is, it can't boot into OS due to low battery(it only shows "Smart Mobility", but can't even enter bootloader mode) And only if it boots into OS successfully, it can be charged.
Anyone met this problem on any other devices before?
How can I stop auto boot when charging?
What can I do?

That must be something specific to the rom on yours... mine does not automatically boot when when power is applied (assuming it is off, not just in sleep mode), and it charges fine when powered off.

dscline said:
That must be something specific to the rom on yours... mine does not automatically boot when when power is applied (assuming it is off, not just in sleep mode), and it charges fine when powered off.
Click to expand...
Click to collapse
Thanks
I use the ROM from this forum
RUU_Kaiser_HTC_WWE_1.56.405.5_radio_sign_22.45.88.07_1.27.12.11_Ship
What is yours?

I'm just using the stock AT&T Tilt rom.

Here's the fix!
Yes, I've had the same problem a few times on my Vario (Wizard). Very annoying.
Here's what to do:
- Take a mini-usb cable (the one you use for sync and charging from a PC) and cut off the mini-USB connector
- Strip the wires
- Take the battery out of your TyTN
- Carefully connect the ground wire (black) with the ground connector (-) on the battery. Fix it with clear tape.
- Now do the same with the (+) (red wire).
- Attach the USB cable to a running PC and let the battery charge for about an hour. After that, put it back in your phone, you'll be able to boot it up and charge it the regular way.
Yes, it costs you a cable, but it solves the problem.

dscline said:
That must be something specific to the rom on yours... mine does not automatically boot when when power is applied (assuming it is off, not just in sleep mode), and it charges fine when powered off.
Click to expand...
Click to collapse
I think you misunderstood. The problem is that the phone only charges when the OS has loaded completely. So if you really run your battery out completely and there is not enough power in your battery to boot up the phone (read: it turns off again before the boot has completed) you won't be able to charge it the regular way. SOMETIMES a heavier charger (2A) does seem to be able to charge the battery even with the OS shut down, but most of the times it won't work anymore... see below for fix.

SteRo said:
I think you misunderstood. The problem is that the phone only charges when the OS has loaded completely.
Click to expand...
Click to collapse
That's not how I read the original post:
When I connect wall power to charge it, the orange LED indicates it was charging, but just few seconds later it automatically boot, and the orange LED was off.
Click to expand...
Click to collapse
Based on this, it sounds like it is starting to charge without the phone booted (orange LED on), but for some reason it then automatically boots up, then crashes because there's not enough power(??)
But if the problem IS that the phone only charges when the OS has loaded, that is also not how my phone operates. In fact, that even goes against the manual, which tells you to plug the phone in (without turning on the phone) and let it charge fully for the initial charge before turning on the phone and allowing it to boot.
Sorry if I misunderstand, but neither way is how my phone operates... it can charge without the OS loaded, and the phone does not automatically boot once power is applied.

Not sure I fully understand what's going on here but, I am wondering if the power on/off button is stuck in (i.e the micro-switch is clicked in and not releasing). I cannot think of any other reason the device would turn on when connecting the charger if the device is powered completely off. ( Except perhaps shorted connections in the Usb port)
Mike

To SteRo:
Thx a lot for the solution, I tried, but still doesn't work.(I charge it more than 2 hours, and still can't boot into OS)
To mikechannon:
yes, it happened. :-( the power on/off button is NOT stucked. And the device is powered off completely.
To All:
Thx for your reply. What I mean is almost what dscline said:
It starts to charge without the phone booted (orange LED on), but for some reason it then automatically boots up(around 15 sec after I plugin power), meanwhile orange LED is off. But it can't load into OS, just re-boot again and again because there's no enough battery. That makes it's impossible to charge, 'coz it's only charged when the OS has loaded completely.
Anyway, I called customer service to ask them replace the battery. I may try to use different ROM and see what will happen. I'll post the result here.

It's also possible that it has nothing to do with the battery or charging at all. I just checked mine, and the charging indicator is lit with the unit off, but it does go out for a bit during the boot processes, then comes back on again. So what you're seeing with the charging light is normal. It may simply be that there's something corrupted, or some other failure with the device, that is causing it to not boot properly, and get stuck in a reboot loop. If so, it will probably do the same thing with a completely charged battery. You may have just been assuming that it was related to a low charge.

That's what I'm worry about,, Coz I can't boot it by SteRo's solution.

okay... they say trouble comes in three's...
Yesterday I flew to Asia, 20-hours with a full charge. No suprises during the trip. Checked email from Narita during the layover, no prob. But after I arrived in Taipei I received the low battery warning. Plugged in my usb-to-usb (notebook to kaiser) cable and "no charge light"!
This morning I plugged it into a ac battery charger and waited for >10 minutes, still no charge light.
Now, at the risk of a battery, I'm attempting to charge the battery removed from the kaiser using the previous mentioned method. In an hour I'll test it.
This afternoon I'll pick up a new battery charger and spare battery.
In 14-months with my trusty TyTN (cht9000) I never once had a problem like this... I'm a little bummed right now...
[update]
okay -- battery is okay and can be charged externally (using the two wire method or an external battery charger). BUT... the device still won't take a charge using either a direct AC adapter or a USB cord. This was also retested after performing a hard-reset. Not a good sign folks.
The charger works (connected to a Trinity), so it's not the problem. They battery works (charged to 45% after 45-minutes connected to an external battery charger). The HTC OS after a clean hard-reset used to work but now doesn't, so it's unlikely it's software related.
I've made no other modifications to the bootloader or SSPL... everything is original stock. Wish I had my TyTN with me right about now...

Sounds like something I had on my previous TyTN:
The power connector was a bit flaky on my charger at home. So when I'd hookup the powerlead it would charge to 10 secs or so and then no longer charge. I had to put some pressure on the connector to have it continue to charge. So I put a ballpen on the powerlead, just under the phone, when charging.
It's a long shot - hope of use. When you've connected the phone to power, and the orange light goes off, try wiggeling the connector a bit - see if that helps.
Hope of use.

Re
OK,
I've got excactly the same problems... I dont want to make you illusions, but you cant solve it and you need to send it back for repair. Your usb connecter on your tytn is broken...
first i will tell my story...
My tytn did excactly the same, shows the led, powers on automatically (normally it don't do that, so it;s not a rom issue) and then powered down in the smart mobility screen. I tried 4 chargers, and 2 battery's. with a full battery it will power on and load windows, but unable to charge. with the empty battery it will power down in the smart mobility screen. soft reset, hard reset, it won't work.
You can check if it's the same problem, by attaching it to your usb on your computer and call up the bootscreen by pressing the camera button and stick your stylus in the soft reset hole. If it comes up with serial instead of usb, then your device usb connector is broken.
BUT, you can charge your battery in a very strange way i figured out. since i am on a buisness trip i need my phone and don't send it back!!!!!
ok, this is what you have to do, plug in the powercable, call the hard reset screen BUT DON'T APPLY!!!! you will notice it will not power down, so just leave it on this screen for a night with the cable connected. you don't see the charging light, but actually it is charging. for me this temporarely solution works fine... but when i'm back in about seven weeks i send it in for repair.
Hope this will help you!

Swiftgs:
Many thanks for your insight -- you are correct, in bootloader mode the Serial shows instead of USB. I just purchased a spare battery (1100mAh, made in Taiwan) and battery charger for US$17. It'll get me through my business trip, but this is disappointing. As I mentioned in my earlier post, I used a TyTN for 14-months (July 2006 to Sept 2007) as my primary phone, recharging it daily via the USB connector and on a desk charger in my office. I can only conclude that if the USB is physically damaged (not evident visually), then it is not as robust as the USB port used in the original TyTN. The strangest part of all is it worked perfectly until the battery level fell below 10%...
FWIW: I purchased the phone through R&D Marketing. Ron Webber quickly responded to my note and gave me a contact at HTC America. I'll follow-up
after I return and report my experience.
Cheers

well, thanks for all of your replies/infomation.
I tried evey possible methods mentioned above, unfortunatelly none of them works :-(
and the most depressed thing is I filnally get a new battery, but it still doesn't work!
So I sent it back to repair, cross figure...

It works
I would like to thanx 2 SteRo for his advice. I am using Qtek 9000 and had the same problem. Battery was empty, and I tried many times to turn on my PPC, but without success. All the time when red light appeared after 10-15 sec display become black and tried to restart from boot again, and it's happened many times. Finally I thought that I just can trow my Qtek, but seeing your recommendation decided to try. I took USB cable cut it and strap the wires. Connecting red on (+) and black on (-) after 1 hour charging I was able to start my PPC, to recharge battery by 100% and it is working now OK. I must check duration of the battery tomorrow, because reason why I discharged battery was automatic turn off of my PPC when it was on around 45-50% battery capacity. Tomorrow I will check how it's working when I recharge battery again.
Dear SteRo you are the king.

Tilt will not charge, simply boots up when plugged in

I have a major problem with my Tilt, when it is off and I plug it in, the phone will not charge and instead just boots up into Windows Mobile. While turned on, the phone will not charge; nothing happens when I plug in the USB cable.
The USB connector *looks* OK, no obviously bent pins or damage compared side by side to other HTC phones, but I'm not an expert with a microscope.
Is this a lost cause or are there things I can try to get the device to charge?

i'm not sure my observations will help you but i noticed the following behavior ONCE...i was too lazy to re-test and confirm my theory, but here goes:
1. if the phone was improperly shut down, the phone would turn on and start booting as soon as i would plug in my wall charger (NON HTC, its a generic Motorola charger). in my case, my device charges fine once the boot up has cleared the boot splash screen.
2. using the usb cable plugged into my pc, the phone would NOT turn on when i would plug in the usb cable. i MIGHT have shut down the phone properly prior to trying this but my memory isn't keeping up with me right now
i guess what i'm trying to say is that i THINK the device is built to turn on the moment a charging source is available, that is if it was improperly shut down.

Thanks for that tip...my Tilt is now plugged in via USB and will charge whether or not it is on or off. I still have to try it with the regular AC adapter, but at least it's not dead!
Edit: Everything is good to go Thx for the tip

[Q] Battery discharging when on powered USB

Here's an interesting discovery - would be interested to know if anyone else has the same issue.
Basically, my old WM6.5 phone (Touch Pro) used to take charge from a powered USB socket, even when the computer was turned off.
Plugging the HD7 into the same USB socket, and the phone won't charge. That's fine, I can understand there may be valid reasons for it.
What's *really* interesting is that if I leave the phone plugged into this powered down PC overnight, the battery is pretty much dead in the morning. Compare this to leaving the phone unplugged completely, and I'd generally see 15% battery usage overnight.
The solution is pretty simple - don't leave the phone plugged into this USB socket, but it seems odd.
Any chance someone else can try this?

Is the Zune client on your pc open because my phone will not charge with zune open
but once i exit out of zune on the pc it charges fine...
ive lost my charger and too lazy and cheap to buy a new one so im just using the pc to do it....

no - the PC is actually powered down. However, with soft power switches, the USB port stilll can get power, as proven by my ability to charge my Touch Pro from USB when the PC's off.

I'm not sure what could be causing this, but i will try to see if mine is the same too, then i will post feedback

I've charged mine on a USB port at work, but there isn't any Zune software in the way there... Honestly, I don't sync through USB, so I never noticed this, but at work I have used the USB port on our camera system to charge my phone...

most likely cause is the fact that the computer reduces the amount of current send to the usb port when powered down.
normaly all that is needed is a move of the mouse or a key press to power the computer back on.
now both the keyboard and mouse are low power devices.
now my guess is that the touch pro needs less power in standby then the hd7, and therefore the first will charge and the second will drain.
so to solve this question you need to measure the power comming from the computer in standby (powered on it's 500mA), and both the phones in standby mode.
plopper

Here's what I find odd:
The phone will not charge unless powered on. For example, if I have the phone turned off, and plug it into the wall charger it came with, the phone boots up. It will NOT charge while turned off.
Anyone else notice this?

jimbonics said:
Here's what I find odd:
The phone will not charge unless powered on. For example, if I have the phone turned off, and plug it into the wall charger it came with, the phone boots up. It will NOT charge while turned off.
Anyone else notice this?
Click to expand...
Click to collapse
i saw someone mention that the led won't turn on during charging while the phone is turned off.
sadly he didn't wait long enough to see if the led turns on when the battery is fully charged.
also i have no idea which model he was using.
plopper

I posted earlier about charging issues on the HD7: http://forum.xda-developers.com/showthread.php?t=849548
What I found was that if you have the HD7 plugged into the USB port and then you suspend/shut down the PC, it'll stop charging (while all other phones I've used - iPhones, HD2, etc. - will keep charging).
Once you suspend/shut down, you need to then unplug and replug the HD7, and it should start charging again. Not sure why this happens, but I need to do it every night, otherwise I have a dead phone in the morning.

jimbonics said:
Here's what I find odd:
The phone will not charge unless powered on. For example, if I have the phone turned off, and plug it into the wall charger it came with, the phone boots up. It will NOT charge while turned off.
Anyone else notice this?
Click to expand...
Click to collapse
That is apparently a "feature" of WP7-- the phone will automatically turn on when plugged in.

Touchpad is charging but not oooting, webos doctor not working

Hello everyone,
I installed a JB rom a few weeks ago on my TP (can't remember which one)...it worked for a little while, then i wanted to flash something additional and it seems to be bricked ever since and has been laying around...which is why I can't remember what exactly I wanted to flash
Anywho, if i connect it to the PC the notification LED on the home button is blinking..but that's it. no combination of power/voldownup/home button seems to be working and when I try to run webos doctor it doesn't recognise my device.
can anyone please help me?

When you say bricked. Do you mean stuck in a boot loop wouldn't turn on etc.
Have you had it connected to the stock charger or better still on a touchstone and if so for how long.
The more information you can give the better.

No it doesn't turn on at all, screen stays black.
It's been connected to what i think is the stock cable to my pc (there are too many Micro-USB cables laying around here ) for about an hour now and i just put it on the touchstone (LEDs are still flashing)..

Leave on the Touchstone for at least a few hours preferably overnight then hold the power and volume up buttons for at least 30 seconds if nothing happens do the same with power and home buttons and post any progress or lack of, but the first thing is to try and put some charge into it and the best for that imo is the Touchstone.

maxiv said:
No it doesn't turn on at all, screen stays black.
It's been connected to what i think is the stock cable to my pc (there are too many Micro-USB cables laying around here ) for about an hour now and i just put it on the touchstone (LEDs are still flashing)..
Click to expand...
Click to collapse
The stock cable for the touchpad has a silver dot at each end. I have two touchpads ad the connection is very loose and unreliable. It often won't charge. I bought new Micro USB charge/sync cables and charging is no longer an issue.
The USB port on your computer is not powerful enough for anything it trickle charge. You need a stock touchpad charger.

Well i charged on the touchstone and then after a few hours i was able to boot into recovery and flash a new rom problem solved, thanks anyway!

Dead battery bootloop

This morning my Teclast X98 battery was down to 5% in Android. I shut down the tablet and connected it to a charger. The moment I connected the tablet to the charger the tablet started to boot. It showed a red charging battery overlay and shut itself down again immediately. The tablet ended up in a bootloop from which there is no escape.
I've had this same problem once before. A couple of weeks ago I somehow managed to get the Tablet into BIOS settings, boot into Windows and perform a shutdown from there. When I shut down from Windows the tablet wil stay off when I connect a charger.
No such luck this time. After 50 or so reboots, with me trying to get into the BIOS settings, the pattern changed. Instead of showing the red battery overlay, the tablet would show warning messages that it could not display the red battery overlay:
ConvertBmpToGopBltofBATMonitor failure
GraphicsOutput -> Blt failure...
One thing that complicates this is that my tablet will not charge anymore when powered on. It only charges when powered off. So it now toggles between: Powered off and charging / Powered on and not charging. It's a known problem when you've used a USB OTG charging hub. Read the comment section on that YouTube video. That guy has tried everything (and so did I).
What options do I have right now?
Leave the tablet in this bootloop, hoping that it will eventually stop booting and start charging
Contact the seller, report the problem and ask for a solution
Take the BIOS chip out and try to charge the tablet without BIOS chip

I managed to get out of this boot loop.
I opened the tablet and unsoldered pin 1 of the EPROM. This prevented the tablet from booting, but it would still charge. I charged it for a couple of hours, soldered pin 1 of the EPROM back and I am now using the X98 again.
If anyone needs some more information, I will search for pictures and write a tutorial.
I still have this problem where the tablet starts automatically as soon as I connect a charger. This only happens if I power off in Android. If I reboot to Windows first and then power off everything is fine. If anyone knows a solution to this problem I can prevent this from ever happening again.

.oOOo. said:
I managed to get out of this boot loop.
I opened the tablet and unsoldered pin 1 of the EPROM. This prevented the tablet from booting, but it would still charge. I charged it for a couple of hours, soldered pin 1 of the EPROM back and I am now using the X98 again.
If anyone needs some more information, I will search for pictures and write a tutorial.
I still have this problem where the tablet starts automatically as soon as I connect a charger. This only happens if I power off in Android. If I reboot to Windows first and then power off everything is fine. If anyone knows a solution to this problem I can prevent this from ever happening again.
Click to expand...
Click to collapse
Hi. Got this problem since last week and I'm really upset, since I've searched a lot and found no solution at all. I've resoldered white and red battery wires but no success... Could you help me with this tutorial about EPROM?
And do you still get these messages when charging if last boot was from Android? Or these characters are gone? Thanks for any kind of help!

rafabrasil85 said:
Hi. Got this problem since last week and I'm really upset, since I've searched a lot and found no solution at all. I've resoldered white and red battery wires but no success... Could you help me with this tutorial about EPROM?
And do you still get these messages when charging if last boot was from Android? Or these characters are gone? Thanks for any kind of help!
Click to expand...
Click to collapse
Yeah, doing the thing with the battery wires did not work for me as well.
If you want to charge your tablet only once, you can use this trick I used:
Open up the tablet
Find the BIOS-chip
Remove the metal heat sink around the chip (it comes off easy)
Now unsolder pin 1. Heat the pin until the solder melts and then push the pin loose with a very small screwdriver
Now charge the tablet. The battery will probably get warm (not hot), and so might some of the chips. The heat will get less when the tablet has been charging for a couple of hours
Solder pin 1 back again
This is the location of the BIOS chip. It is the chip at the bottom of the picture below.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
In the picture below the heat sink has been removed. Pin 1 is indicated with a grey dot on the bottom right corner of the BIOS chip.
Another solution, if your tablet does not charge at all when powered on. I did manage to get my tablet charging again with a custom USB cable. This is the video from 1KeNnY1KeNnY1 descibing the solution:
I bought these USB connectors from China on eBay (adafruit sells one too) and these resitors also from eBay. If you need the components fast I'm sure you can find them in a local electronics shop.
You will also need a very stable hand and a lot of patience to solder the USB connector. Make sure you get a few of them because you will probably ruin the first one.
Then:
Find a USB cable that charges with a decent charge. Make sure the wire is not too thick for the new USB connector.
Cut off the mico-usb connector and strip the wires
Solder the red wire to pin 1, and the black wire to pin 5
Solder the 2.2 kOhm resistor between pin 1 and pin 4
Do not connect the green and the white wire. If you do, Windows will think you connected a malfunctioning device when you use the custom cable.
Here's an image showing which colour goes where.
And this image shows you all the pin numbers:

Wow! Great tutorial, man. Thanks a lot!! Wish more people have your kind spirit and help others with less knowledge.
If I understood it right, first option gives me one full charge but I will have to open tablet again when battery is empty, and the bootloop error isn't gone. The second will let me charge it normally but only using the new modified cable and the anoying error is gone forever... Is that right?
I will try these methods asap this week and reply to you.
Many thanks!
Have a nice day.

rafabrasil85 said:
Wow! Great tutorial, man. Thanks a lot!! Wish more people have your kind spirit and help others with less knowledge.
If I understood it right, first option gives me one full charge but I will have to open tablet again when battery is empty, and the bootloop error isn't gone. The second will let me charge it normally but only using the new modified cable and the anoying error is gone forever... Is that right?
I will try these methods asap this week and reply to you.
Many thanks!
Have a nice day.
Click to expand...
Click to collapse
You can still charge the tablet when it is off, and it won't charge when the tablet is on, right? I've searched through your posts but gave up after a couple of them. So I'm not really sure if your problem is exactly the same as mine. Could you copy-paste your initial problem report here in this thread?
I'm using Windows on my Teclast x98 so I used to hibernate my tablet automatically after 30 minutes of inactivity. When the tablet is off, it will start charging. And because the power off was triggered in Windows, the tablet will not boot automatically when the charging starts.
If you use Android, you're out of luck. You will have to boot into Windows and then shutdown the tablet from there to get it to charge. That's a major hassle. And if you forget it once and Android keeps running until the battery is too low, you will end up with the same problem you have now.
The custom cable is the best solution if your tablet does not charge when powered on. Other solutions will kill you tablet pretty fast. Doing too many hibernations will ruin the SSD. Desoldering the BIOS chip will also fail after 10 times or so. In both cases the tablet is ruined.

.oOOo. said:
You can still charge the tablet when it is off, and it won't charge when the tablet is on, right? I've searched through your posts but gave up after a couple of them. So I'm not really sure if your problem is exactly the same as mine. Could you copy-paste your initial problem report here in this thread?
I'm using Windows on my Teclast x98 so I used to hibernate my tablet automatically after 30 minutes of inactivity. When the tablet is off, it will start charging. And because the power off was triggered in Windows, the tablet will not boot automatically when the charging starts.
If you use Android, you're out of luck. You will have to boot into Windows and then shutdown the tablet from there to get it to charge. That's a major hassle. And if you forget it once and Android keeps running until the battery is too low, you will end up with the same problem you have now.
The custom cable is the best solution if your tablet does not charge when powered on. Other solutions will kill you tablet pretty fast. Doing too many hibernations will ruin the SSD. Desoldering the BIOS chip will also fail after 10 times or so. In both cases the tablet is ruined.
Click to expand...
Click to collapse
Thanks again for your help!!
No, I can't charge because when I plug it to energy, this bootloop starts and battery seems not to charge at all! When it enters in this bootloop state, pressing the power button does nothing. Pressing it for 10 seconds does nothing. Pressing power plus volume does nothing too. When I unpplug tablet from power, I get no response from it, just a black screen.
Before this happens, charging was working ok, I could charge it from both OS and didn't matter if it was on or completely shutted down. One day I was using it (don't remember in which system) and battery started to deplete itself from nowhere, so I plugged the original charger with original cable, as always. But they stopped working, battery discharged and then it was gone...
Ok, thanks for your patience and all information. I will try modding the cable, then I post here the results.
Have a nice day.

rafabrasil85 said:
Thanks again for your help!!
No, I can't charge because when I plug it to energy, this bootloop starts and battery seems not to charge at all! When it enters in this bootloop state, pressing the power button does nothing. Pressing it for 10 seconds does nothing. Pressing power plus volume does nothing too. When I unpplug tablet from power, I get no response from it, just a black screen.
Before this happens, charging was working ok, I could charge it from both OS and didn't matter if it was on or completely shutted down. One day I was using it (don't remember in which system) and battery started to deplete itself from nowhere, so I plugged the original charger with original cable, as always. But they stopped working, battery discharged and then it was gone...
Ok, thanks for your patience and all information. I will try modding the cable, then I post here the results.
Have a nice day.
Click to expand...
Click to collapse
That sounds a lot like my problem.
I do not think the custom cable will get you out of this situation. My cable doesn't provide a lot of power (about 0.6A or 3W). When I use the tablet with the cable connected, the battery still drains slowly. So the cable does not provide enough power for the tablet to run. Booting the tablet uses even more power.
I think you will have to jump start your tablet and charge the battery once like I did. After that you can use the cable to prevent the tablet from losing all its power again. This works for me in Windows where I can put the tablet to sleep. During sleep it will charge slowly. I haven't tried Android yet. I will do some tests in the next couple of days.

.oOOo. said:
That sounds a lot like my problem.
I do not think the custom cable will get you out of this situation. My cable doesn't provide a lot of power (about 0.6A or 3W). When I use the tablet with the cable connected, the battery still drains slowly. So the cable does not provide enough power for the tablet to run. Booting the tablet uses even more power.
I think you will have to jump start your tablet and charge the battery once like I did. After that you can use the cable to prevent the tablet from losing all its power again. This works for me in Windows where I can put the tablet to sleep. During sleep it will charge slowly. I haven't tried Android yet. I will do some tests in the next couple of days.
Click to expand...
Click to collapse
Nice! I'm waiting for your tests then. By the way, what do you mean with jump start?

rafabrasil85 said:
Nice! I'm waiting for your tests then. By the way, what do you mean with jump start?
Click to expand...
Click to collapse
I've done some tests today:
If the tablet boots it uses more power and the battery discharges, even with the custom USB cable connected
Charging under Android is very slow (approximately 10% / hour) if you are just browsing some websites. If you run a game or set the brightness of the screen higher I'm sure the battery will discharge
It is possible to power off the tablet from Android with the custom USB cable connected
The tablet needs more power then the USB cable supplies while booting. So you will not be able to revive your dead tablet with the USB cable alone. You will need to do the trick with desoldering pin 1 of the BIOS chip. I called that "jump start" in my previous post, but the comparison to jump starting a car is totally not obvious or correct.

.oOOo. said:
I've done some tests today:
If the tablet boots it uses more power and the battery discharges, even with the custom USB cable connected
Charging under Android is very slow (approximately 10% / hour) if you are just browsing some websites. If you run a game or set the brightness of the screen higher I'm sure the battery will discharge
It is possible to power off the tablet from Android with the custom USB cable connected
The tablet needs more power then the USB cable supplies while booting. So you will not be able to revive your dead tablet with the USB cable alone. You will need to do the trick with desoldering pin 1 of the BIOS chip. I called that "jump start" in my previous post, but the comparison to jump starting a car is totally not obvious or correct.
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Now I got it! Lol
What a pain to have bought this tablet. I thought it was a great choice, but one year later I'm dealing with BIOS and battery wires and modded USB cables.
Thanks for all the good info. You are great!

X98 Saga
.oOOo. said:
I've done some tests today:
If the tablet boots it uses more power and the battery discharges, even with the custom USB cable connected
Charging under Android is very slow (approximately 10% / hour) if you are just browsing some websites. If you run a game or set the brightness of the screen higher I'm sure the battery will discharge
It is possible to power off the tablet from Android with the custom USB cable connected
The tablet needs more power then the USB cable supplies while booting. So you will not be able to revive your dead tablet with the USB cable alone. You will need to do the trick with desoldering pin 1 of the BIOS chip. I called that "jump start" in my previous post, but the comparison to jump starting a car is totally not obvious or correct.
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Click to collapse
Friend,
Sorry for the long delay, but I had other problems with this tablet (the flex power cable broke) and for a long moment I gave up using it.
So here is the situation: I've fixed the charger and the other problems, and now I can turn it on but there are no OS anymore, it goes directly to a shell. I can access the UEFI settings and tried installing Windows via pen drive, but when it gets to the screen which allows me to choose the drive to install, it is empty. System is not recognizing eMMC anymore... Do you have any hint on this?
I think it's been a year or more since I use this device for the las time, and it will be great to get it back working.
Thanks for your time again! =)

rafabrasil85 said:
Friend,
Sorry for the long delay, but I had other problems with this tablet (the flex power cable broke) and for a long moment I gave up using it.
So here is the situation: I've fixed the charger and the other problems, and now I can turn it on but there are no OS anymore, it goes directly to a shell. I can access the UEFI settings and tried installing Windows via pen drive, but when it gets to the screen which allows me to choose the drive to install, it is empty. System is not recognizing eMMC anymore... Do you have any hint on this?
I think it's been a year or more since I use this device for the las time, and it will be great to get it back working.
Thanks for your time again! =)
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hi, can I ask how did you solve your charging problem?. I have similar situation like yours, my tablet wouldn't hold the charge and it boot loops to shell prompt when connected to power source. I was not able to do the windows installation because once I remove from the power source, the tablet wouldn't bootup.

sunshine76 said:
hi, can I ask how did you solve your charging problem?. I have similar situation like yours, my tablet wouldn't hold the charge and it boot loops to shell prompt when connected to power source. I was not able to do the windows installation because once I remove from the power source, the tablet wouldn't bootup.
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First you build a custom charging cable with the instructions on this thread. Then you connect a UEFI Windows installation (prepared by Rufus) via pen drive. Make sure you have a HUB to also connect mouse and keyboard. In all my trials so far I ended only being able to boot RemixOS and ChromeOS via live boot with pen drives, but they miss touch input and some drivers. I'm still trying to reinstall Android directly to eMMC, but I don't have much hope left that it will work... I guess this memory is gone with this error.