Bootloader/Fastboot cable found.... I think. (Marquee & P970) - LG Optimus Black

Since our phones are so close, I thought I would post this here for feedback and ideas.
Monkeying around last night in Recovery Mode with the phone tethered to the PC. I wasn't paying close attention to the cord and the connector had started to come out of the phone plug and was slightly crooked. Suddenly the recovery menus stop working and up pops the white box with the yellow arrow coming out of it and the little android standing in front of it. FASTBOOT MODE?????
(This is when I noticed the cable position.)
I reseated the connector and then opened a command prompt on my PC and was able to enter "fastboot devices" and recieved an ID string back.
Then foolishly I tried to see if I could use the adb command to reboot into fastboot. NO luck, it just rebooted the device.
I tried going backi nto recovery and replicating the position of the connector but was not able to repeat my luck.
This makes me think that a USB Jig may be needed for our phones to enter that mode like some of the Galaxy phones.
Thoughts?
Just discovered these items
http://www.gpgindustries.com/banners2011/2011-10-12-3-in-1-Micro-USB-LG-Cable.jpg
http://www.ditsblog.com/dits-latest-launches/lg-3-in-1-micro-usb-cable/
http://www.gsmsp.com/products/Servi...LG/3_in_1_micro_USB__LG_Cable__343_19133.html
Will these cables allow us to enter fastboot? They say for "Service Mode" and "Flash/Unlock".
Has anyone tried or know if they work?

how about adb reboot-bootloader?

gabwerkz said:
how about adb reboot-bootloader?
Click to expand...
Click to collapse
Probably would have been a better choice than reboot.
Since I can't figure out how to trick my phone back into that mode, I may never know!
I hope this will inspire someone to figure out what I managed to do to get there in the first place.

Sorry..... should have read the post by "miticogirl" asking the same question.

Exactly, my question was "Is this possible to use homemade JIG for SGS to our OB" but i've made it and it doesen't work.

miticogirl said:
Exactly, my question was "Is this possible to use homemade JIG for SGS to our OB" but i've made it and it doesen't work.
Click to expand...
Click to collapse
You already asked it here: http://forum.xda-developers.com/showthread.php?t=1325391

radkor said:
You already asked it here: http://forum.xda-developers.com/showthread.php?t=1325391
Click to expand...
Click to collapse
That thread has been closed, we'll keep the conversation going in this thread.

Found one of the cables in the UK and ordered it.
http://www.fonefunshop.co.uk
Will post test results when it arrives.

what news? how i can remove splash screen without fastboot? any ideas?

tcaudill01 said:
Found one of the cables in the UK and ordered it.
http://www.fonefunshop.co.uk
Will post test results when it arrives.
Click to expand...
Click to collapse
]
Sorry to dig out an old thread.
But did you manage to get into fastboot with the cable from fonefunshop, as there local to me and wouldnt mind this cable myself?
Thanks

Related

i think i bricked my captivate

I don't know what I did but I can't get my phone to do anything. I tried to do a factory reset and now when I turn my phone on all it does is have this little computer voice saying factory reset detected. I tried the whole download thing over 100x's i'm getting pissed and I don't know what to do. I need my phone for work someone please help.
Can you get it into download mode? Put cable into usb on computer ( do not connect to phone ) pull battery on phone. hold down the volume button, plug battery in and then plug into usb should put it in download mode. If you can do that you can use Odin and flash the rom back on the phone. Follow this thread for files and directions.
http://forum.xda-developers.com/showthread.php?t=731989&highlight=Odin
No i can't get to download mode
Search out the jig solution to get into download mode
Sent from my SAMSUNG-SGH-I897 using XDA App
mcord11758 said:
Search out the jig solution to get into download mode
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
The resistor in the jig solution cost more than insurance I'm good lol.
Have you tried all the various button combos to get to Download Mode?
yes, I have tried them all. The only thing my phone does is boot the att logo then the galaxy s logo and then the screen turns black but the buttons stay lit.
Sounds like you'd benefit from a JIG, but it looks like you would rather replace the phone.
Good luck
have you seen the cost of the jig procedure. you would to lol
Jig is about 9$ if you do it the quick way, which is cheap. if you can order the breakout board then its about 5$
Have you tried to do a "adb reboot download" during the boot process ??
the little part you connect to your usb cable is 163 bucks
silvertag said:
Have you tried to do a "adb reboot download" during the boot process ??
Click to expand...
Click to collapse
i tried but command prompt says that their is no device found. I don't know if I'm doing anything wrong with the command prompt.
driver issue an or usb port on pc issue
Soulweaver said:
have you seen the cost of the jig procedure. you would to lol
Click to expand...
Click to collapse
I am VERY familiar with the JIG procedure (as you can see in my sig).
Soulweaver said:
the little part you connect to your usb cable is 163 bucks
Click to expand...
Click to collapse
That's a JTAG box, not a JIG
norcal einstein said:
That's a JTAG box, not a JIG
Click to expand...
Click to collapse
How would i go about buying one from you
in order to do your way what steps should i do all together for me to boot through adb
Soulweaver said:
How would i go about buying one from you
Click to expand...
Click to collapse
You can just PM me your PayPal address and I'll send over an invoice for you to pay if you'd like. $15 shipped and I can still get one out today.
norcal einstein said:
You can just PM me your PayPal address and I'll send over an invoice for you to pay if you'd like. $15 shipped and I can still get one out today.
Click to expand...
Click to collapse
sent you a pm

[Q] The SUPER Bricked Phone

Like, this isn't even funny anymore. My phone is bricked and I've used the Jig. Now it doesn't even go to the download screen, it just skips to a Galaxy S Gt-i9000 screen and when I try to run Odin one click - it gets stuck on File Analysis.
/Worst brick ever
WHAT SHOULD I DO NOW??!?!??
What happens when you use jig
mcord11758 said:
What happens when you use jig
Click to expand...
Click to collapse
It goes to a screen that says...
GALAXY S
GTi-9000
SAMSUNG
miahsoul said:
Like, this isn't even funny anymore. My phone is bricked and I've used the Jig. Now it doesn't even go to the download screen, it just skips to a Galaxy S Gt-i9000 screen and when I try to run Odin one click - it gets stuck on File Analysis.
/Worst brick ever
WHAT SHOULD I DO NOW??!?!??
Click to expand...
Click to collapse
Okay, your phone is obviously getting to the stage that it can receive commands (seeing as Odin can recognize it). Download ADB (android debug bridge). I'm not going to go into a tutorial now. Ask if you need one, I'll write one.
Once you have that downloaded and installed, go to the directory containing adb.exe and type "adb reboot download" without the quotes. Your phone should reboot into download mode.
Edit: Found this standalone ADB file, in case you don't want to download and install the whole SDK. Props to velnens123.
BTW; I'm assuming you already have drivers for your phone installed. If not, this will not work, nor will pretty much anything else.
Loggik said:
Okay, your phone is obviously getting to the stage that it can receive commands (seeing as Odin can recognize it). Download ADB (android debug bridge). I'm not going to go into a tutorial now. Ask if you need one, I'll write one.
Once you have that downloaded and installed, go to the directory containing adb.exe and type "adb reboot download" without the quotes. Your phone should reboot into download mode.
Edit: Found this standalone ADB file, in case you don't want to download and install the whole SDK. Props to velnens123.
BTW; I'm assuming you already have drivers for your phone installed. If not, this will not work, nor will pretty much anything else.
Click to expand...
Click to collapse
Fingers crossed. Hope this works. :X
EDIT
"Device not found"
The drivers, I'm assume are the ones you need to mount the phone right?
miahsoul said:
It goes to a screen that says...
GALAXY S
GTi-9000
You are not touching the right prongs in the usb port
Click to expand...
Click to collapse
mcord11758 said:
You are not touching the right prongs in the usb port
Click to expand...
Click to collapse
Never heard that one before, but don't think that's possible. Some of the guides I've read suggest placing the resistors on the outside places of the usb port, not on any specific prong. Regardless, if his computer recognizes the phone (which it does... Odin can see it), then ADB should work perfectly.
mcord11758 said:
miahsoul said:
It goes to a screen that says...
GALAXY S
GTi-9000
You are not touching the right prongs in the usb port
Click to expand...
Click to collapse
Highly unlikely. When I do the button combo I get this screen too...
Click to expand...
Click to collapse
miahsoul said:
mcord11758 said:
Highly unlikely. When I do the button combo I get this screen too...
Click to expand...
Click to collapse
Trust me you are
Which button combo, that screen comes up when phone turns on
Click to expand...
Click to collapse
nbs11 said:
Drivers: http://www.mediafire.com/?fr8bkogcu923wdu
Click to expand...
Click to collapse
Those are the ones you need. Dunno if you have x64 or x32 Windows, but that file should have both.
Also, be sure to run ADB more than once. If you get Device Not Found, do not close the command prompt window, try unplugging and replugging the phone and wait for Windows to make it's hardware detected noise, then try again.
Yeah, the jig needs to be on pins 4&5, closest ones to headphone port iirc. Never had to use one personally but pretty sure that is what I've read.
jig can and will turn your phone in if the wrong prongs are touched
Thread is getting off topic; there are more than three posts about the same fix without a reply from the OP. Give it a rest...
Anyway, any proper jig should, should, be made with an actual mini USB, not just shoving the resistors into the phone, though it would work, it's just a lot less safe.
I have to agree with every one. I have had to make and use a jig. Sense I had it i tested all the how to's here and if you are not touching the right pins in the port (i highly suggest using a USB plug in) then all it will do is turn it on. They have to be touching pins 4 & 5 otherwise it will just boot up
Loggik said:
Those are the ones you need. Dunno if you have x64 or x32 Windows, but that file should have both.
Also, be sure to run ADB more than once. If you get Device Not Found, do not close the command prompt window, try unplugging and replugging the phone and wait for Windows to make it's hardware detected noise, then try again.
Click to expand...
Click to collapse
RGHHHHHHHH!!
I hear the sound that window makes when it detects the device, but ADB command prompt says error device not founddd.
Trust me, it's not the Jig, I've gotten it to start up to this screen 10 times with the closest to the jack.
mcord11758 said:
miahsoul said:
Trust me you are
Which button combo, that screen comes up when phone turns on
Click to expand...
Click to collapse
Vol up + Down
Done the way you said to do it in my last thread.
Click to expand...
Click to collapse
Have you fixed it yet?
I bricked my captivate pretty badly about 1.5 months ago too but i built a jig and fixed it. It doesn't sound like you've done that yet, though...
If i were you I'd build a jig and make sure the pins and resistances are correct and try again. I've heard the resistance from the skin on your fingers can affect it enough that it not work.
I attached a picture showing which pins to connect on a micro-usb "plug in"
Good luck,
Eric
ericstewart22 said:
Have you fixed it yet?
I bricked my captivate pretty badly about 1.5 months ago too but i built a jig and fixed it. It doesn't sound like you've done that yet, though...
If i were you I'd build a jig and make sure the pins and resistances are correct and try again. I've heard the resistance from the skin on your fingers can affect it enough that it not work.
I attached a picture showing which pins to connect on a micro-usb "plug in"
Good luck,
Eric
Click to expand...
Click to collapse
I made a jig, just not with the USB one. :S
I'll probably just buy one off of Ebay for simplicity's sake and lack of interest of wasting more time. I spent more time :/
Can anyone here tell me how C-fone is?
http://cgi.ebay.com/Samsung-Galaxy-...Cell_Phones&hash=item230d45e4ec#ht_546wt_1156
He seems legit to me, but I just want other member feedback to make sure.
I've sold to quite a few on here for what it's worth.
miahsoul said:
I made a jig, just not with the USB one. :S
I'll probably just buy one off of Ebay for simplicity's sake and lack of interest of wasting more time. I spent more time :/
Can anyone here tell me how C-fone is?
http://cgi.ebay.com/Samsung-Galaxy-...Cell_Phones&hash=item230d45e4ec#ht_546wt_1156
He seems legit to me, but I just want other member feedback to make sure.
Click to expand...
Click to collapse
Never bought a jig... never really had to (I just got mine replaced under thirty days). I can't give feedback on someone I've never bought from, though he seems to have some considerable rep (positive feedback). I can recommend though, this http://www.mobiletechvideos.com/blog/?page_id=100
Though for considerably more ($13.00), I can guarantee that that one will work.

MobileTech 'Jig' NOT working

I've had not luck with any button combination, battery pulling, pulling/installing the usb jib etc.
I have had NO luck.
I have noticed that the phone will go blank and NOT show the (phone-!-desktop) icon.
Please advise. Any and all attempts to put the phone into download does not work. The Jig actually just keep the phone screen, that's it.
The screen/ phone shows the 'phone ! computer' screen.
You are trying to use the jig with the phone powered off, right? Trying to use it with the phone on will not work at all.
mrhaley30705 said:
You are trying to use the jig with the phone powered off, right? Trying to use it with the phone on will not work at all.
Click to expand...
Click to collapse
The screen/ phone shows the 'phone ! computer' screen.
ericd1 said:
The screen/ phone shows the 'phone ! computer' screen.
Click to expand...
Click to collapse
Congratulations you have achieved download mode.
I am not amused by your phones performance
ericd1 said:
The screen/ phone shows the 'phone ! computer' screen.
Click to expand...
Click to collapse
Does it say something about firmware upgrade failure?
mrhaley30705 said:
Does it say something about firmware upgrade failure?
Click to expand...
Click to collapse
yes, and to try recovery mode.
no go on all
Doesn't matter if you use a JIG and and you get a random screen you always try to see if ODIN sees it....
prbassplayer said:
Doesn't matter if you use a JIG and and you get a random screen you always try to see if ODIN sees it....
Click to expand...
Click to collapse
ODIN recognizes a device. What then? Reinstalling anything failed.
Then its not the Jig's issue its either you doing it wrong or a faulty cable. Basics run ODIN as admin and put your phone in DL mode. Connect your phone to a Mother board usb hub and that should work. If that doesn't work then your cable could be faulty.
prbassplayer said:
Then its not the Jig's issue its either you doing it wrong or a faulty cable. Basics run ODIN as admin and put your phone in DL mode. Connect your phone to a Mother board usb hub and that should work. If that doesn't work then your cable could be faulty.
Click to expand...
Click to collapse
Yes sir. OK. I'll look into the cable question. It may well be the cable as I've experienced issues with it when putting movie files on the phone to play on TV in the past.
prbassplayer said:
Then its not the Jig's issue its either you doing it wrong or a faulty cable. Basics run ODIN as admin and put your phone in DL mode. Connect your phone to a Mother board usb hub and that should work. If that doesn't work then your cable could be faulty.
Click to expand...
Click to collapse
You were right on the money. Bought a new gigaware cable from the shack and was able to just simply work the ODIN magic on the phone. Wow. I'm amazed at how some problems have such simple solutions.
ericd1 said:
You were right on the money. Bought a new gigaware cable from the shack and was able to just simply work the ODIN magic on the phone. Wow. I'm amazed at how some problems have such simple solutions.
Click to expand...
Click to collapse
You should probably consider that before calling out someones product.
^ What he said. That being said Good to hear you got it running.
THANK YOU!
prbassplayer said:
Doesn't matter if you use a JIG and and you get a random screen you always try to see if ODIN sees it....
Click to expand...
Click to collapse
This post saved my phone. thank you for those words of WISDOM.:good:

Mini froze, now it wont respond...

Hello, my situation is this: S3 Mini running Carbon Rom 4.4.4 , flashed with TWRP. After running great for a few weeks, suddenly after charging all night the phone froze ( was on FB on CM Browser). It was totally unresponsive to any attempts so I pulled the battery ( this did happen a couple times before) and when I tried to restart, nothing. The phone responds to nothing, no download, no recovery, no charger.... battery is charged and I did try a different battery to no avail. The only response I get is if it is connected to a PC before I install the battery then when I install it (the battery) the PC tries to install u8500 usb rom drivers, which of course it never finds. Samsung device drivers are installed on the PC. Odin also fails to see it.
Is it dead? Is it salvageable? Can I recover any data off it?
Sorry for the new thread but it seemed I could not find a case exactly like mine.
Pino Fundez said:
Hello, my situation is this: S3 Mini running Carbon Rom 4.4.4 , flashed with TWRP. After running great for a few weeks, suddenly after charging all night the phone froze ( was on FB on CM Browser). It was totally unresponsive to any attempts so I pulled the battery ( this did happen a couple times before) and when I tried to restart, nothing. The phone responds to nothing, no download, no recovery, no charger.... battery is charged and I did try a different battery to no avail. The only response I get is if it is connected to a PC before I install the battery then when I install it (the battery) the PC tries to install u8500 usb rom drivers, which of course it never finds. Samsung device drivers are installed on the PC. Odin also fails to see it.
Is it dead? Is it salvageable? Can I recover any data off it?
Sorry for the new thread but it seemed I could not find a case exactly like mine.
Click to expand...
Click to collapse
I had the same issue after flashing a wrong bootloader. I gave the phone back where I bought it telling that I doesn't know why he didn't started anymore. They replaced my telephone motherboard and now it works.
theov3rc0mer said:
I had the same issue after flashing a wrong bootloader. I gave the phone back where I bought it telling that I doesn't know why he didn't started anymore. They replaced my telephone motherboard and now it works.
Click to expand...
Click to collapse
There's no warranty on my device so taking it back is not an option. The phone was working fine for while so I suppose it's not the bootloader... what suprised me is that it happened outta the blue, not during start up... thanks for the advice though mate.
Pino Fundez said:
There's no warranty on my device so taking it back is not an option. The phone was working fine for while so I suppose it's not the bootloader... what suprised me is that it happened outta the blue, not during start up... thanks for the advice though mate.
Click to expand...
Click to collapse
I think you can try with an usb jig or you can find someone with a jtag (there are millions of guides about those solutions, just google it). :good:
theov3rc0mer said:
I think you can try with an usb jig or you can find someone with a jtag (there are millions of guides about those solutions, just google it). :good:
Click to expand...
Click to collapse
The jig I can do, no harm trying but the jtag is hard to find....
Guys i have this exact same problem and i'm getting desperate. i remember there was a special usb cable but i can't remember the name...
Could you please link me to anything? Absolutely anything? i really need this phone alive
M4v3r1cX said:
Guys i have this exact same problem and i'm getting desperate. i remember there was a special usb cable but i can't remember the name...
Could you please link me to anything? Absolutely anything? i really need this phone alive
Click to expand...
Click to collapse
basically from what I've read, the jig you either buy off Ebay for 3$ or solder 300kΩ across pins 4 and 5 of a micro usb connector, But look it up before cause a nuclear holocaust
Pino Fundez said:
basically from what I've read, the jig you either buy off Ebay for 3$ or solder 300kΩ across pins 4 and 5 of a micro usb connector, But look it up before cause a nuclear holocaust
Click to expand...
Click to collapse
Today i bought the usb jib and... no, it didn't work. God damn
I guess i'll just let the phone die and i'll buy a new one... it was a good phone.
M4v3r1cX said:
Today i bought the usb jib and... no, it didn't work. God damn
I guess i'll just let the phone die and i'll buy a new one... it was a good phone.
Click to expand...
Click to collapse
Honestly, I didnt think the jig would work, which is why Im not in much haste to do it, before you dump it though mate, try and find someone close to you with a JTAG setup.... I havent had much luck with that.
It was an ok phone... either I had high expectations or it was below the hype but that is just my 2 cents... at the end of the day it was a useful tool....

[Help] Samsung Galaxy Ace Duos Hard Brick

After I took this Samsung Galaxy Ace Duos(SCH-i589) and refreshed the GT-S5830 ROM with Odin, it became a hard brick (I did this because I installed AIDA64 Android Edition and it said gt-s5830 under "Hardware", which turned out to be purely misleading, I thought it would refresh successfully) now the phone has no reaction, no Recovery, no download mode, nothing, complete hard brick, no reaction, what should I do? : (
DavidLiang1129 said:
After I took this Samsung Galaxy Ace Duos(SCH-i589) and refreshed the GT-S5830 ROM with Odin, it became a hard brick (I did this because I installed AIDA64 Android Edition and it said gt-s5830 under "Hardware", which turned out to be purely misleading, I thought it would refresh successfully) now the phone has no reaction, no Recovery, no download mode, nothing, complete hard brick, no reaction, what should I do? : (
Click to expand...
Click to collapse
If the device is completely unresponsive, there is nothing you can do as an end user to fix it.
You're going to have to have it repaired or replaced.
V0latyle said:
If the device is completely unresponsive, there is nothing you can do as an end user to fix it.
You're going to have to have it repaired or replaced.
Click to expand...
Click to collapse
Thank you for your reply! It's not completely unresponsive, after I press the download mode shortcut for a few seconds, the screen flickers a little and then goes out, nothing happens, as if it wanted to enter download mode but failed
V0latyle said:
If the device is completely unresponsive, there is nothing you can do as an end user to fix it.
You're going to have to have it repaired or replaced.
Click to expand...
Click to collapse
In addition I had to remove the battery and then connect the computer without the battery before this could be triggered
In addition, I tried this method, but I don't know how long to press these buttons, I keep pressing them, but the screen just keeps flashing and nothing happens
V0latyle said:
If the device is completely unresponsive, there is nothing you can do as an end user to fix it.
You're going to have to have it repaired or replaced.
Click to expand...
Click to collapse
my friend who has a Samsung Galaxy Ace 3(GT-S7278U) also went through a hard brick like this, he told me to charge the phone, after about 24 hours, the phone will automatically go into download mode, I haven't tried it yet, I've never heard of this method (picture is my friend's phone)
V0latyle said:
If the device is completely unresponsive, there is nothing you can do as an end user to fix it.
You're going to have to have it repaired or replaced.
Click to expand...
Click to collapse
I bought a USB JIG from an online shopping platform because I checked the forums and the vast majority of people said that USB JIG would help, but the merchant said "this product will not help hard bricks" which confused me a little, I wanted to know the exact answer? If you or someone else can answer it, I would appreciate it! (Also, luckily, I didn't refresh the partition table. A friend of mine said that if I did, the phone would be dead.)
DavidLiang1129 said:
I bought a USB JIG from an online shopping platform because I checked the forums and the vast majority of people said that USB JIG would help, but the merchant said "this product will not help hard bricks" which confused me a little, I wanted to know the exact answer? If you or someone else can answer it, I would appreciate it! (Also, luckily, I didn't refresh the partition table. A friend of mine said that if I did, the phone would be dead.)
Click to expand...
Click to collapse
The only jig I could think of would be JTAG, and while I imagine the board does have a JTAG header, Qualcomm (and Samsung) provides a means to perform low level flashes using specialized tools such as QPST. However the tools and the files necessary are not publicly available and there is zero end user support. Most repair centers won't reflash your phone; they'll just replace the main board and program it with your IMEI.
V0latyle said:
The only jig I could think of would be JTAG, and while I imagine the board does have a JTAG header, Qualcomm (and Samsung) provides a means to perform low level flashes using specialized tools such as QPST. However the tools and the files necessary are not publicly available and there is zero end user support. Most repair centers won't reflash your phone; they'll just replace the main board and program it with your IMEI.
Click to expand...
Click to collapse
Thank you for your reply. As far as I know, USB JIG comes in two varieties, one is forced to boot the device into download mode via a MicroUSB plug with 4 resistors, and the other is what you call JTAG, and I bought the former
V0latyle said:
The only jig I could think of would be JTAG, and while I imagine the board does have a JTAG header, Qualcomm (and Samsung) provides a means to perform low level flashes using specialized tools such as QPST. However the tools and the files necessary are not publicly available and there is zero end user support. Most repair centers won't reflash your phone; they'll just replace the main board and program it with your IMEI.
Click to expand...
Click to collapse
USB JIG arrived today, but it didn't work... I removed the battery two seconds later, put it back on the phone, and plugged in the USB JIG, but nothing happened, I even waited five minutes, was I using it wrong? I even paid about 10 CNY(about $1.50) for it, including a 2 CNY USB JIG and 8 CNY shipping... If it's just a dust plug, it's not a good deal...) I need help. Thank you so much!
Good news, guys! Instead of using the USB JIG, I switched to a USB cable that was just on the charger of one of my old phones. I connected my battery-free Galaxy to my computer, pressed volume up + Volume Down + Power, and something magical happened: my computer made the sound of new hardware discovery! The screen lights up and displays the Samsung Logo, but it goes black after a few seconds. (I think the USB cable doesn't connect reliably, but only it works.)
DavidLiang1129 said:
Good news, guys! Instead of using the USB JIG, I switched to a USB cable that was just on the charger of one of my old phones. I connected my battery-free Galaxy to my computer, pressed volume up + Volume Down + Power, and something magical happened: my computer made the sound of new hardware discovery! The screen lights up and displays the Samsung Logo, but it goes black after a few seconds. (I think the USB cable doesn't connect reliably, but only it works.)
Click to expand...
Click to collapse
Check Device Manager and see if it displays an unknown device
V0latyle said:
Check Device Manager and see if it displays an unknown device
Click to expand...
Click to collapse
Thanks for your reply, on my first attempt, I didn't look for an unknown device, Windows just said "failed to install device driver" and I never succeeded again... The screen was just black, but when I plugged the phone into the computer using the USB cable, Windows said there was an unrecognized USB device. I tried several USB cables, but only that made the computer respond
V0latyle said:
The only jig I could think of would be JTAG, and while I imagine the board does have a JTAG header, Qualcomm (and Samsung) provides a means to perform low level flashes using specialized tools such as QPST. However the tools and the files necessary are not publicly available and there is zero end user support. Most repair centers won't reflash your phone; they'll just replace the main board and program it with your IMEI.
Click to expand...
Click to collapse
By the way, this phone uses Qualcomm SOC. Can I remove it and short some contacts to enter 9008 mode?
DavidLiang1129 said:
By the way, this phone uses Qualcomm SOC. Can I remove it and short some contacts to enter 9008 mode?
Click to expand...
Click to collapse
Not that I know of
V0latyle said:
Not that I know of
Click to expand...
Click to collapse
Ok, so it doesn't seem like there's any other software-based way to recover it, thanks for all your help, but I'm still looking forward to what software-based way to recover it
DavidLiang1129 said:
Ok, so it doesn't seem like there's any other software-based way to recover it, thanks for all your help, but I'm still looking forward to what software-based way to recover it
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Click to collapse
You can try these if you haven't already. Sometimes 3's a charm... This article indicates there are hard points present, I can't verify that as you're deeper than I ever care to go. If that option is viable you better make sure you get it right as it bypasses all built in safeguards and as I understand it could completely brick the phone for good. Might want pay a expert with lots of experience try to recover it... or learn as you go.
blackhawk said:
You can try these if you haven't already. Sometimes 3's a charm... This article indicates there are hard points present, I can't verify that as you're deeper than I ever care to go. If that option is viable you better make sure you get it right as it bypasses all built in safeguards and as I understand it could completely brick the phone for good. Might want pay a expert with lots of experience try to recover it... or learn as you go.
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Thank you!! When I followed Method 3, the phone screen flashed and Windows told me it had found an unrecognized USB device! I feel like I'm getting there!!
blackhawk said:
You can try these if you haven't already. Sometimes 3's a charm... This article indicates there are hard points present, I can't verify that as you're deeper than I ever care to go. If that option is viable you better make sure you get it right as it bypasses all built in safeguards and as I understand it could completely brick the phone for good. Might want pay a expert with lots of experience try to recover it... or learn as you go.
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Click to collapse
What do I do next? Do I need any hardware drivers?
DavidLiang1129 said:
What do I do next? Do I need any hardware drivers?
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I haven't a clue but for Windows you need the right USB drivers. You can try the find the right driver option as well as checking Event Viewer for error messages, etc. Or more Google searches...
I purposely avoided playing with the firmware on Androids including upgrades/updates. That works well for me.

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