Hi. I have a problem with a Dell Latitude 7520. There was a BIOS password. I desoldered the flash chip and tried flashing various dumps — but nothing happens. The board doesn’t start up, not even with the original BIOS file.
There was one dump with which the board would start — the keyboard backlight comes on — but then the screen displays RGB colors and the laptop shuts down. I read about a similar issue in a thread about unlocking the BIOS password on this laptop.
The motherboard is fine — the laptop was working before. I understand the problem is likely in the BIOS. I’ve already tried about 10 different dumps, but nothing worked.
Please help me solve this issue.
GDC31 LA-K371P
Rec 3.0 (A02)
ST = GQG54J3
I’m attaching the original dump.
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DELL LATITUDE 7420 i7 PROCESSOR
ST: GF6DNN3
GDC31 LA-K371P REV: 3.0(A02) 2021-12-10
PWB PN: D955X
I WANT BIN BIOS
MY OLD FILE I LOSSLeave a comment:
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Hi guys, i m stucked with this LATITUDE 7420 Power error can be turned on for 5 seconds, then automatically turns off and then the voltage is sufficient again.
here is the original dump, thank you in advance for your help
Dell Latitude 7420
Service Tag : 6Y7R6MN3
EX: 15129569595
Model : P117G
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3.4. Dell
Dell laptops store the password in EC. However, some generators exist depending on the code suffix.
See: https://beta.bios-pw.org/ .If the website is offline try: https://web.archive.org/web/*/https://bios-pw.org/
Note: All passwords must be entered with a US QWERTY Keyboard,you can use a USB one.
Note: The 6FF1 suffix has a bug,use your service tag with the 1F5A or BF97 suffix instead,Example: 1234ABC-BF97 .
Note: The list of examples does not include some other suffix codes that do work,such as E7A8 .
Note: If the BF97 suffix does not work try it with the E7A8 suffix instead.
Note: There is no publicly available 8FC8 generator available at the moment.
The CTRL-ENTER-ENTER keystroke after the password only applied to laptops with a suffix (xxxxxxx-8FC8 for example), until Dell also required it in some laptops using System Disable 16-Hex algorithm, on which only the Password+ENTER was needed at first and then in some models you needed the CTRL-ENTER-ENTER to properly delete the system passwords, otherwise the password would remain SET upon the automatic system reboot if just doing Password+ENTER until the proper CTRL-ENTER-ENTER keystroke was performed in certain models.
8FC8 Patcher software: https://www.badcaps.net/forum/troubl...l-8fc8-patcherLeave a comment:
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GOOD MORNING PLZ HELP ME TO CLEAN MY BIOS SERVICE TAG IS DK9VH3-8FC8
THIS IS MY OLD BIOSLeave a comment:
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hello.
DELL LATITUDE 7520
please fix my dead bios dump or send me a good one.
with the original dump my laptop is dead, no power,no light keyboard, etc.
with other bios have power, light keyboard and rgb collors one by one on the screen.
i attache the original bios.
thank you.Attached Filesif you find these attachements useful please consider making a small donation to the site
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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 am requesting urgent assistance to unbrick my laptop, a rebranded TongFang GK7MRFR chassis. The laptop is completely dead following a faulty in-OS EC flash attempt.
I have successfully used a CH341A programmer and can read/write/verify both flash chips, but using my backups/extractions has failed to restore power. The root cause is likely a corrupted Intel Management Engine (ME) region or an incompatible EC/BIOS pairing. System & Hardware Details- Barebone / Chassis: TongFang GK7MRFR
- MB: MB: GK5MP5X V1.0 Prod :GK5MRFV10T04201310281
- Rebrand: PC Specialist
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Hello everyone,
I recently bought a non-working Asus Zenbook Pro Duo OLED UX8402ZA that was listed for parts only. The seller mentioned that it had no display output but that the charging lights worked.
When the laptop arrived (without a charger and SSD), I connected a charger and confirmed with a multimeter that it was charging the battery. However, when I tried to power it on, only the backlight of the secondary display came on. There was no image, and it didn’t boot into the BIOS.
I decided to try flashing a new BIOS, but since I didn’t want to desolder... -
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...
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