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Mọi khoản quyên góp cho badcaps đều được hoan nghênh, hãy nhấp vào liên kết này để quyên góp. Cảm ơn tất cả những người ủng hộ----------------------------------------------------------------------------------------------------------------------------------------------------------------Comment
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Hi everyone, I need your help, I replaced a mosfset due to no net shorted power, I checked that I have all the voltages and they are correct, the keyboard starts electrically and turns on, I hear the fans starting but nothing on the screen.
ACER NITRO 5 AN515-55-73PG
SN: NHQ7MET00B026057803400SNID: 02602240034MAIN: FH51 LA-J871P REV:1A 2020-03-30Thanks so much in advanceComment
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I need help
Problem: laptop has power with led lights on keyboard but no display..Thank you in advance
Motherboard: FH51M LA-J871P REV 1B
Acer Model: AN515-55 57DA
S/N: NHQ7NSP004033179AB3400
SNID: 03309668334
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Mọi khoản quyên góp cho badcaps đều được hoan nghênh, hãy nhấp vào liên kết này để quyên góp. Cảm ơn tất cả những người ủng hộ----------------------------------------------------------------------------------------------------------------------------------------------------------------Comment
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Mọi khoản quyên góp cho badcaps đều được hoan nghênh, hãy nhấp vào liên kết này để quyên góp. Cảm ơn tất cả những người ủng hộ----------------------------------------------------------------------------------------------------------------------------------------------------------------Comment
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HELLO, PLEASE HELP ME WITH THIS BIOS, IT DOES NOT ENABLE VCC CORE AND VCC GT
FH51M LA J871P REV 1B 2020 06 04
AN515 55 576K
SN NHQ7MAL00J051087433400
SNID: 05103462734Comment
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Can someone upload BIOS file for my Acer Nitro laptop..black screen, just keyboard light. Bought new BIOS IC and have programmer tool. Done that before but i cant find bios file
AN517-52-76YU
SN: NHQ8KEZ008022054043400
SNID:02202150834
MODEL:N20C2Comment
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Hello friends, I have a question, whenever I change a PCH on an Acer notebook, the machine does not turn on if the PCH is used and removed from a different brand notebook, it only works with a new PCH or one removed from another Acer, any chance of a change in the bios making it work? I have this board here (la-j871p), I got the PCH from a Lenovo, but it doesn't work, as expected, I tried different bios, I have the original bios.Comment
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It is because of bootguard. You can only use a PCH from an acer donor board with the same bootguard settings or use a PCH with no bootguard, then if the bios has bootguard the bios can be modified to disable bootguard. You can`t put a PCH with bootguard from a different brand and modify the bios, you would have to add the OEM key etc, not possible.Comment
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Hello friends, how are you?
I need help cleaning the ME region of my Dump file.
This equipment is going through a PCH replacement, and I'm installing a new PCH today.
LA-L181P Motherboard Rev: 1B
ACER MODEL: AN515-57-79TD
S/N: NHQESAA005225086703400
SNID: 225034416Comment
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Hello. Need an engineering BIOS for Acer Nitro 5 FH51M LA-J871P REV 1B. To bypass Subsystem ID check. Help pleaseComment
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Hello everyone,
I’m currently working on a dead MSI GP75 Leopard (MS-17E71) motherboard (i7 CPU, NVIDIA GPU) with a no display/no backlight issue initially. After extensive investigation, I’m at a critical stage involving EC firmware, BIOS/ME region interaction, and possible deep corruption. I'm seeking advanced insight from anyone with experience in EC/BIOS sync issues or PCH-level behavior. Here’s a full breakdown:
🧩 Initial Issue- Board powers on (fans spin, keyboard lights up and can be adjusted, caps lock led lights), but no display or backlight
- External display (HDMI) shows
07-24-2025, 02:17 PM -
Hello everyone.
I'm here to ask for help troubleshooting an issue with my Acer Nitro 5 An55-515. Board number fh51m LAJ871P .
The laptop turns on without any image, and after inspection, I noticed the 1.2V voltage was reading 8V spikes. The PQM1 MOSFET's gate was shorted to the source.
I replaced PQM1, PQM2, and PUM1. After turning on the machine, the 1.2V voltage appears correctly for about 1 minute, but after that, PQM1 shorted again. The MOSFET and controller assembly has already been replaced twice and continues to blow. I can't understand what's going on. I should also add... -
First of all thanks to all of our members who have posted previously all methods posted here.
Please leave a comment if you find something new,or have anything else to add.
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Find by serial number,model number or series
If you know the laptop serial or model number go to HP support https://support.hp.com/us-en/drivers/laptops .
Enter the serial number or model number and click submit.On the next screen you will have to enter the OS
Operating system and OS version.If... -
Hi, my laptop wont boot at all
With original bios no POST, only LED lights
With alternative BIOS from model TP500LN (flashed via programmer) the notebook works again
Some issues
A- with bios from 500LN, it won't update from bios of model 500LA (from 500LN v203 to 500LA v300)
B- If updated from 500LN version 203 to 300, the battery stops being recognized
Things I tried
1- Update / clear ME: Took the non working bios, made a backup, and did this: https://www.badcaps.net/forum/troubl...theory/trouble... -
Hello, I have an old Dell G3 3579 (ST: 2WQ7LP2-8FC8) with a newer 8FC8 BIOS password. I have successfully attached to the flash chip (W25Q128JVSQ) on the motherboard with a CH341A programmer and made several modifications using Intel FIT (e.g., allow software SPI write) without bricking. I was also able to boot to a modified GRUB shell where I attempted to edit many BIOS security related options like BIOS Guard/Lock, Flash Signature Override, ME FW Image Re-Flash, etc.
Unfortunately, some of these modifications like to Intel BIOS Guard failed because it is fused into the PCH. Also,...
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