Database Develop

[Q] Battery with question mark, unable to charge/boot/SBF

Hey all,
I got my Droid 4 a month ago and rooted it. It ran out of power while I was outside. When I tried charging it, a battery icon with a question mark comes up. I can't boot to Safestrap, and when I go to Fastboot, it says "Battery Low -- Cannot Program".
The phone doesn't turn on unless I plug it into the wall charger. If I plug it into the USB port on my laptop, the green LED comes on, but it won't turn on. I can boot to Android recovery, and I tried formatting /data and /cache, but that didn't help.
Funny thing: I can keep the phone in Android recovery, leave it plugged in, and it charges up enough to stay on for a while when I unplug it.
Now, I know about the Macgyver trick, and I'd like to give that a shot. iFixit has a fantastic teardown of the Droid 4, but unfortunately, removing the battery would very clearly void my warranty (although I guess having Safestrap voids that already), and I'm worried about doing permanent damage to my device. Are there any solutions besides "beg Verizon for a new phone"? Has anyone tried Macgyvering a Droid 4?

Curious, if you do BP Tools, does it drop you into Safestrap? I know mine does, and then maybe you can change some settings. Also, you could try to make a "Factory Cable". I know I made mine from my old OG Droid dock as it had the 5 wire jumper, and just jumped the 2 wires and it allowed me to flash w/o a charged battery.

I would ensure that the charger is putting out 5.1v and 850mA as my d4 won't charge or power on after the battery dies unless its with the factory charger or one that meets these specs
Sent from my DROID4 using XDA

Soulmech said:
Funny thing: I can keep the phone in Android recovery, leave it plugged in, and it charges up enough to stay on for a while when I unplug it.
Click to expand...
Click to collapse
Have you tried leaving it plugged in for an extended period of time, say overnight, and see if it'll boot up?

gdeeble said:
Curious, if you do BP Tools, does it drop you into Safestrap? I know mine does, and then maybe you can change some settings. Also, you could try to make a "Factory Cable". I know I made mine from my old OG Droid dock as it had the 5 wire jumper, and just jumped the 2 wires and it allowed me to flash w/o a charged battery.
Click to expand...
Click to collapse
Just tried BP Tools. It lets me drop into Safestrap, but Safestrap won't load due to the battery issue.
Hope you don't mind me asking, but what's a factory cable? Is it just a USB cable with the B end cut off, and the black and red wires stripped? My issue with jumping the device/battery is that I'm unable (or supposed to be unable) to remove the battery, so any solution along those lines would have to allow me to keep the battery in place. Otherwise, my warranty is voided.
I know root voids it, but I'd have a better chance of sneaking that by than an obviously-moved battery.
dbreezy187 said:
I would ensure that the charger is putting out 5.1v and 850mA as my d4 won't charge or power on after the battery dies unless its with the factory charger or one that meets these specs
Sent from my DROID4 using XDA
Click to expand...
Click to collapse
I'm using the charger that came with the phone. It says 5.1V/850mA on the side.

bdbraaten said:
Have you tried leaving it plugged in for an extended period of time, say overnight, and see if it'll boot up?
Click to expand...
Click to collapse
Tried it last night. Left it in recovery for a good 8 hours or so. No dice.

Did you try opening it, then removing the battery? If you pull up too hard with out a removal tool, the glue is strong enough to allow the battery to bend and break internally, causing this error. Might check if another battery works, there are some available online if you search.

nequeelrey said:
Did you try opening it, then removing the battery? If you pull up too hard with out a removal tool, the glue is strong enough to allow the battery to bend and break internally, causing this error. Might check if another battery works, there are some available online if you search.
Click to expand...
Click to collapse
Isn't the reason the battery is non-removable because the type of battery chemistry used can explode of that type of damage occurs? Or do they just hate us?
Has anybody ever been turned down for warranty work that is hardware related, even if they are rooted, etc? I've never heard of it happening...
If OP get a dud battery, s/he should just get it replaced by Moto. They shouldn't have to try to replace it themselves.

Try the instructions from this thread and let us know if it works...
http://forum.xda-developers.com/showpost.php?p=23678683&postcount=1

The OP said they tried the BP Tools method but it is disabled due to Safe strap using that as the trigger for its bootstrapped recovery.
Using a factory cable would allow you to boot the phone and either flash the stock firmware or uninstall Safe strap and let you charge the phone while in BP Tools mode.
That is the only safe a certain way to recover the device. Hot wiring the battery with a USB cable cannot be considered safe, but will work if you want to fix it yourself without a factory cable.
Using a factory cable to flash the full XML.zip with RSD Lite is the first thing a technician would do to restore it if it was returned under warranty anyway, after checking for physical damage of course.

I've got a few factory cables laying around and would be more than happy to send you one, let me know. Just cover the postage and you'll be flashing in no time.

So to update: I have an insurance policy with Global Warranty Group, and I filed a claim with them, which got me a new device (instead of a refurb). So, I suppose the issue is moot.
Rick#2 said:
I've got a few factory cables laying around and would be more than happy to send you one, let me know. Just cover the postage and you'll be flashing in no time.
Click to expand...
Click to collapse
I would be grateful if you could send me one. I will PM you to figure out details on paying you for postage.

The same thing is happening to me and I have Droid X, any help?

Will BP work after removing safestrap from the advanced menu? If so I think you could use that link to charge from BP.
Sent from my DROID4 using xda premium

usb cable splice works
Just chiming in here to confirm a spliced usb cable will charge an xt894 battery. my situation was pretty much an xt894 with a wiped system (therefore, unable to charge) and not enough battery to fastboot. if I plugged it into a charger or a 5v usb slot from my computer just a green led would show on the front, but no charge. I removed my battery, cut a usb cable in half, and hooked up the wires to the coresponding terminals on the battery (which are clearly marked) and it charged up just fine and I was able to fastboot.
Not the prettiest solution, but it really helped me out when I absolutely needed to charge in order to fastboot, although it will void your warranty if that's important to you.
I currently have a problem where the question mark shows in the battery while charging and I'm unable to boot into OS or safestrap. I'm not at home right now, but I have an extra battery that I'll pop in later to see if that changes anything, or has enough juice to fastboot.

This morning my wife woke up to no battery charge, because I stole her charger in the night. But she has the question mark even though the phone was working fine last night! I wonder, considering I left the USB cord plugged in on the D4 end when I took the charger (to use my cord) could I have screwed something up? She's going to leave it in the OEM charger all day at work, but the quesiton mark worries me.
My question is, if I do the cut cord trick to manually charge the battery at the terminals, does that help recover it so that it can be charged via regular means? Or is it just a way to get the data off the phone? Phone is stock 4.1 with root.

[Q] Phone died and wont turn back on

Ok so a short few weeks ago I plugged my phone into a generic charger to charge for the night. When I woke up the next morning the phone was off. I tried all of the button combinations and even the official charger and nothing changed just the occasional flash of the green LED. Fast forward to yesterday... I got in my eb40 battery and put it in the phone. Plugged it in and it gave me a green light that flashed for two seconds when I put it on the official charger, but it still will not turn on...
Is there anything I am missing or is my phone just dead for good?

Try getting a factory cable to charge with. Not the oem one a factory one.
Sent from my PACMAN MATRIX HD MAXX

Kinda related. My Dad's AHD started randomly rebooting when it was being charged. It ended up being his USB cable had a short in it. I gave him one of my backup Moto cables and it works just fine now. His lesson should have been "Don't leave my cord tight at a weird ass angle coming from the dongle" but it really was "My son will just give me a new one if I screw this one up".
Night before last I used a friends generic wall charger on my AHD running PAC and it took forever to charge. 8 hours went from 56% to 97% and it was pretty hot too. The only generic charger I've used with my AHD that actually worked just fine is a cheap ass Dollar Store car charger with a USB port on it.
In my experience with Moto phones, only use Moto Wall Chargers & Moto Cables, but generic car chargers with Moto Cables seem to be just fine. My Moto Bravo and Defy don't like non-Moto wall chargers either.
My suggestion would be the same as post 2, only when you get that cable, in fastboot mode, do a full factory reset and flash your previous stock firmware (assuming it was ATT 4.1.1), root/unlock it if necessary, flash Bell or Mex 4.1.2 with Myth/Fastboot/RSD, do whatever. With a factory cable you can flash with 0 battery and be OK (it powers the phone directly from the USB port).

Thanks for the tip. I will look into either buying one or making my own factory cable. Yall Rock!

One last question before I set about my quest. Can I make a factory cable from any micro usb cable?

Yeah, just use a high quality one.

I got a factory cable and plugged it in to my comp. Nothing happened. I guess my phone must be dead.
Side note: If i take the battery out and plug it into my comp with the regular usb cable the green light comes on and my comp registers it as a usb input device. Does that mean anything to anyone?

Can you measure any voltage across the battery termiinals? Does the battery look in good condition?

The first thing I did was put a brand new battery in it. The old one was starting to get ripples like it was swelling. Once I get home I will try and get a reading off the battery terminals though.
Update: Just got home. Battery is reading a solid 3.7 on the multimeter.

I guess its time to retire my poor little Atrix HD... it was barely over a year old
If any one can think of anything else to try, Please feel free to post your ides. I will check back here often to see if there are any new suggestions.

springduck said:
The first thing I did was put a brand new battery in it. The old one was starting to get ripples like it was swelling. Once I get home I will try and get a reading off the battery terminals though.
Update: Just got home. Battery is reading a solid 3.7 on the multimeter.
Click to expand...
Click to collapse
This, maybe?

Last night while using my Atrix HD with 4.3 CM 10.2 nightly from maybe 2 weeks ago, my phone froze. After hitting the power button repeatedly the screen finally went off. Now it wont turn back on, it had plenty of battery life left, I tried 2 chargers to try to get an led reading response, nothing. Strange coincidence out phones went out so near to one another.

Yea it really sucks. I loved this phone. Now im stuck using my X10 for a year till I get an upgrade.

[Q] Droid 3 bricked

My droid 3 will not boot, if I plug it in to my computer, it will not turn on and it will show no screen, it all happened after I restored my phone on a low battery. It is missing certain files like the bootloader so i can't restore the rom on the phone. What should I do?

trevorjanssen12 said:
My droid 3 will not boot, if I plug it in to my computer, it will not turn on and it will show no screen, it all happened after I restored my phone on a low battery. It is missing certain files like the bootloader so i can't restore the rom on the phone. What should I do?
Click to expand...
Click to collapse
Maybe it needs to charge. Plug it into a wall socket.

Well I need to get the phone back up and running and the bootloader as well as the charging program is missing. I have a brand new battery for it. It is fully charged.

I got the phone up and running

trevorjanssen12 said:
I got the phone up and running
Click to expand...
Click to collapse
So what was the problem

jithudigitised said:
So what was the problem
Click to expand...
Click to collapse
The problem was when I originally tried to flash it... it failed due to dead battery... WORST MISTAKE EVER... so I purchased a fastboot cable and tried to get the phone up and running but it was mounting the device in windows as OMAP4430 so I tried again last month and I got it back up and running with the latest version of android... the one that came with the device.

I AM SO ANGRY AT THIS PHONE.. IT WILL NOT EVEN BOOT IN TO ANDROID!

trevorjanssen12 said:
The problem was when I originally tried to flash it... it failed due to dead battery... WORST MISTAKE EVER... so I purchased a fastboot cable and tried to get the phone up and running but it was mounting the device in windows as OMAP4430 so I tried again last month and I got it back up and running with the latest version of android... the one that came with the device.
Click to expand...
Click to collapse
I'm having a similar issue with trying to fix a friend's phone that only displays the "Dual Core" logo when plugged into the computer. The computer itself doesn't appear to register that the phone is connected so doesn't show up in device manager that I can see. Plugging into a wall outlet doesn't light the device screen up, only the computer (Win7 box). I believe he dunked the bootloader, and it's bricked, but I'm trying to fix it anyway. Anyone reading this, I would appreciate any useful pointers or suggestions. Thanks all.

bwpoersch said:
I'm having a similar issue with trying to fix a friend's phone that only displays the "Dual Core" logo when plugged into the computer. The computer itself doesn't appear to register that the phone is connected so doesn't show up in device manager that I can see. Plugging into a wall outlet doesn't light the device screen up, only the computer (Win7 box). I believe he dunked the bootloader, and it's bricked, but I'm trying to fix it anyway. Anyone reading this, I would appreciate any useful pointers or suggestions. Thanks all.
Click to expand...
Click to collapse
battery maybe dead, if software is corrupt/soft bricked, phone will not charge battery
get a Motorola Factory Cable Adaptor by Team Black Hat or Battery Desktop Charger for Motorola Droid 3 XT862

sd_shadow said:
battery maybe dead, if software is corrupt/soft bricked, phone will not charge battery
get a Motorola Factory Cable Adaptor by Team Black Hat or Battery Desktop Charger for Motorola Droid 3 XT862
Click to expand...
Click to collapse
That occurred to me as well, I'm going to first see if the local Verizon store can charge it (or even replace it) for free. My friend actually did manage to score a power cable, but I'm not convinced yet that that is what I need (since I'm getting nowhere with it). I'd like to eliminate the battery as an issue if possible first before spending any money.

bwpoersch said:
That occurred to me as well, I'm going to first see if the local Verizon store can charge it (or even replace it) for free. My friend actually did manage to score a power cable, but I'm not convinced yet that that is what I need (since I'm getting nowhere with it). I'd like to eliminate the battery as an issue if possible first before spending any money.
Click to expand...
Click to collapse
Verizon will not replace battery for free, if phone is more than 1 year old
The software that charges the battery is very easily corrupted, can be reflashed with firmware, but need a charged battery.
The TBH factory cable adaptor will power the phone direct from usb port, no battery is even needed, then firmware can be flashed and charging will work again.

sd_shadow said:
Verizon will not replace battery for free, if phone is more than 1 year old
The software that charges the battery is very easily corrupted, can be reflashed with firmware, but need a charged battery.
The TBH factory cable adaptor will power the phone direct from usb port, no battery is even needed, then firmware can be flashed and charging will work again.
Click to expand...
Click to collapse
I've actually gotten a battery in the past for an obsolete phone, but out of packaging and possibly used. My friend acquired a power cable (not sure from where) which just lights the screen as described above (with or without battery installed), but turns off as soon as I unplug it, so I have my suspicions about the usability of his cable. I struck out with the local Verizon store, so will just order the wall charger and charge the battery next. Crossing fingers... Thanks for supplying that link tho, that's the one I will use.

Follow-up: It took 3 weeks to receive that battery charger from Singapore of all places, but it worked. I didn't charge it up all the way, maybe just to 50%. The phone with battery immediately was able to boot into fastboot. Using rsdlite and motohelper installed, I had the phone back to fully functional within 15 minutes.
Sent from my SCH-I605 using Tapatalk

Great, thanks for the update.
---------- Post added at 08:21 AM ---------- Previous post was at 08:17 AM ----------
One thing you should check.
Is the battery bulged on one or both sides?
If you lay on a table, does it spin like a top?
If so battery should be replaced.

sd_shadow said:
Great, thanks for the update.
---------- Post added at 08:21 AM ---------- Previous post was at 08:17 AM ----------
One thing you should check.
Is the battery bulged on one or both sides?
If you lay on a table, does it spin like a top?
If so battery should be replaced.
Click to expand...
Click to collapse
No, the battery was/is fine (in fact, fully charged afterwards it lasted 2 days on standby). I think my friend probably was just trying to flash a new ROM and didn't notice he had such a low charge. Still not sure why the cable he bought didn't provide the necessary charge to recover, but that's what you get sometimes with aftermarket equipment I guess. Still, it's good to know that is a possible solution for someone else down the road.

sd_shadow said:
battery maybe dead, if software is corrupt/soft bricked, phone will not charge battery
get a Motorola Factory Cable Adaptor by Team Black Hat or Battery Desktop Charger for Motorola Droid 3 XT862
Click to expand...
Click to collapse
I already have this and I did not get it working so I got a DROID 4

[Q] Help please - Phone Bricked

I bought a Moto G 2014 Dual Sim XT1068 back in November and hadn't had any issues with it until today. I bought an anger 3000MaH portable battery pack and was amazed at how quickly it charged my phone. I used it yesterday and charged it overnight. I used it throughout today. I turned it off around midday and plugged it into my charger. When I attempted to turn it on later nothing happened. No, please charge, no **** has crashed, just nothing. The screen just stays dark. My computer no longer recognises it as a device and my portable charger will no longer recognise it as a phone to be charged, I know this because it worked with a friends phone, but not mine, and it still has battery (the charger)
What should I do?
Do I use ADB, ask Anker, return it, what is my best course of action?
If anyone knows what to do please reply as until this is fixed I do not have any ideas.
PS; No rooting, bootloader unlocking, or use of custom ROMs has occurred, the phone is completely using stock android.

Motogsecondgen2014 said:
I bought a Moto G 2014 Dual Sim XT1068 back in November and hadn't had any issues with it until today. I bought an anger 3000MaH portable battery pack and was amazed at how quickly it charged my phone. I used it yesterday and charged it overnight. I used it throughout today. I turned it off around midday and plugged it into my charger. When I attempted to turn it on later nothing happened. No, please charge, no **** has crashed, just nothing. The screen just stays dark. My computer no longer recognises it as a device and my portable charger will no longer recognise it as a phone to be charged, I know this because it worked with a friends phone, but not mine, and it still has battery (the charger)
What should I do?
Do I use ADB, ask Anker, return it, what is my best course of action?
If anyone knows what to do please reply as until this is fixed I do not have any ideas.
PS; No rooting, bootloader unlocking, or use of custom ROMs has occurred, the phone is completely using stock android.
Click to expand...
Click to collapse
I soft-bricked mine yesterday because TWRP kept crashing when I flashed my ROM. During my search for a solution I ran into a post from a guy with a similar problem of yours. His phone wouldn't charge at all.
He solved his problem by pressing PWR+VolDwn for 3 minutes. Then plug it in to a charger and leave it be. And make sure to use a proper charger (cable straight from the wall preferably)
Give that a try. Try ruling out a hardware problem. And return it as a last resort. Good luck

Ogglord said:
I soft-bricked mine yesterday because TWRP kept crashing when I flashed my ROM. During my search for a solution I ran into a post from a guy with a similar problem of yours. His phone wouldn't charge at all.
He solved his problem by pressing PWR+VolDwn for 3 minutes. Then plug it in to a charger and leave it be. And make sure to use a proper charger (cable straight from the wall preferably)
Give that a try. Try ruling out a hardware problem. And return it as a last resort. Good luck
Click to expand...
Click to collapse
TRY this plug in charger and hold power for 2 mins+ to force a reset and forced boot up - holding for 120 seconds + is the key and repeat charger cable must be plugged in.
- power and volume down is normally to get to AP fastboot flash mode, agreed a good wall charger is needed not usb port power.

reefuge said:
Searching google
Cant remember but i thought it was plug in charger and hold power for 2 mins+ to force boot up - power and volume down is normally to get to AP fastboot flash mode, agreed a good wall charger is needed not usb port power.
Click to expand...
Click to collapse
Okey, you are probably right. I was quoting from my foggy mind

Asus Memopad (me176cx) dead?

The tablet is dead, it was suddenly. Won't charge or turn on and it's not recognised by the PC. Recovery mode (power button + volume-) doesn't work either.
I know that is not the screen, because the PC doesn't detect the tablet at all. I tried with another battery (my wife has the same tablet), but I had no luck. I also know that the charger and the usb cable are fine.
What else I can do, any ideas or suggestions?

maloyztor said:
The tablet is dead, it was suddenly. Won't charge or turn on and it's not recognised by the PC. Recovery mode (power button + volume-) doesn't work either.
I know that is not the screen, because the PC doesn't detect the tablet at all. I tried with another battery (my wife has the same tablet), but I had no luck. I also know that the charger and the usb cable are fine.
What else I can do, any ideas or suggestions?
Click to expand...
Click to collapse
Are you using the OE usb cable? Have you tried charging using the OE wallwart?

TonyStark said:
Are you using the OE usb cable? Have you tried charging using the OE wallwart?
Click to expand...
Click to collapse
Yes, I'm using the OE usb cables (I have 2) and the OE charger.

maloyztor said:
The tablet is dead, it was suddenly. Won't charge or turn on and it's not recognised by the PC. Recovery mode (power button + volume-) doesn't work either.
I know that is not the screen, because the PC doesn't detect the tablet at all. I tried with another battery (my wife has the same tablet), but I had no luck. I also know that the charger and the usb cable are fine.
What else I can do, any ideas or suggestions?
Click to expand...
Click to collapse
I had the same symptoms after disconnecting and reconnecting battery,I hed to disconnect it for like an hour and then three times try to power on the tablet and it did power on. Maybe your battery is dead so after another hour you may try to use the other battery. If it will work, try to connect the batteries together so the dead one can get a little charge (but do some research I am not sure if it won't have a chance to damage anything) then the same after an hour connect try power on and if it powers on immediately give it a charge.

Mis012 said:
I had the same symptoms after disconnecting and reconnecting battery,I had to disconnect it for like an hour and then three times try to power on the tablet and it did power on. Maybe your battery is dead so after another hour you may try to use the other battery. If it will work, try to connect the batteries together so the dead one can get a little charge (but do some research I am not sure if it won't have a chance to damage anything) then the same after an hour connect try power on and if it powers on immediately give it a charge.
Click to expand...
Click to collapse
Just wondered if you had tried this and if so, how you got on? Asking because I bought my daughter one off ebay and it was working fine when I got it, am sure I recharged it once , she played it and then again in morning and thinks she played it till battery ran out. I have since tried charging via pc and mains power, and have disconnected battery twice (case was v. easy to remove so concerned this fault may be reason it was sold), but cannot get a flicker of a response on screen. i got my daughter this as she was desperate for an android tablet for mods for minecraft as I had bought her a Amazon Fire 7 and from what I could see just after xmas, it wasnt possible to root it or sideload at that time, and she said Amazon had no mods compared to the play store and she had been ecstatic with the mods she had found for her android for the short time she had it. I do know when I plug it into the wall charger that the motherboard area gets warm if its been plugged in for a while? Bit of a noob on this stuff,and off sick with probs with my nervous system so my concentration and memory can be a pia. Anyway I was wondering how I can find out if its goosed or what I can try? One of the batterys advertised on ebay is about £50 which seems steep to me, esp. if it doesnt fix it, and esp since I have been unable to work for a few years cos of this illness. I only bought the tablets cos I had extra money after I finally applied and got pip, and got it backdated. Any recommendations for a reasonably priced option for her for her minecraft? Should I go the tablet\notebook type route or can they not handle minecraft? Bit confused by these new notebooks esp touchscreen ones as new ones seem to have small amounts of ram yet are v. popular.
Thanks for advice\thoughts\feedback and let me know if I should start ,y own thread...I only jumped on this to see how he got on and then as I do nowadays with this illness, I then jumped from topic to topic that jumped into my head x sorry x

nikkiandmidgets said:
Just wondered if you had tried this and if so, how you got on? Asking because I bought my daughter one off ebay and it was working fine when I got it, am sure I recharged it once , she played it and then again in morning and thinks she played it till battery ran out. I have since tried charging via pc and mains power, and have disconnected battery twice (case was v. easy to remove so concerned this fault may be reason it was sold), but cannot get a flicker of a response on screen. i got my daughter this as she was desperate for an android tablet for mods for minecraft as I had bought her a Amazon Fire 7 and from what I could see just after xmas, it wasnt possible to root it or sideload at that time, and she said Amazon had no mods compared to the play store and she had been ecstatic with the mods she had found for her android for the short time she had it. I do know when I plug it into the wall charger that the motherboard area gets warm if its been plugged in for a while? Bit of a noob on this stuff,and off sick with probs with my nervous system so my concentration and memory can be a pia. Anyway I was wondering how I can find out if its goosed or what I can try? One of the batterys advertised on ebay is about £50 which seems steep to me, esp. if it doesnt fix it, and esp since I have been unable to work for a few years cos of this illness. I only bought the tablets cos I had extra money after I finally applied and got pip, and got it backdated. Any recommendations for a reasonably priced option for her for her minecraft? Should I go the tablet\notebook type route or can they not handle minecraft? Bit confused by these new notebooks esp touchscreen ones as new ones seem to have small amounts of ram yet are v. popular.
Thanks for advice\thoughts\feedback and let me know if I should start ,y own thread...I only jumped on this to see how he got on and then as I do nowadays with this illness, I then jumped from topic to topic that jumped into my head x sorry x
Click to expand...
Click to collapse
Firt I would try to trickle charge the battery.

BEFORE YOU DO THIS:
Remove the SD CARD. I forgot to do this and snapped my card straight in half removing the back cover.
This started happening to my ME176 as well but of course not until after I retired it and gave it to my mom.
I would start by letting it sit on the charger for about 30 minutes (since we don't know the current charge state and if the overcharge block is functioning). This will give it a slight charge if dead.
Disconnect charger and remove the back cover and disconnect the battery (as posted earlier). Push and hold the power button a few times even though there is no power.
It may take a few tries of disconnecting and reconnecting the battery before it decides to power up, so keep the cover off while doing this.