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Thanks Flea. I had modified U366 with another dump prior to finding the leaky cap (thinking it was an EC update failure). Once the cap was replaced, the laptop booted up, however reported an Endpoint Security failure. I did try a downgrade to V1.30 to reflash but it bricked the machine. Restoring both my original dumps resolved that so messing with the EC bios you will get this problem.
The primary fault was the leaky cap on P3V3_RTC pulling it down to 0.75V. It measured 12 ohms initially, but went full short when I injected 3V onto it.Comment
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Hi,
this Elitebook I bought was previously worked on. Symptoms included 5 short CapsLock blinks and fans on full speed. Core voltages were missing, I found rotten trace from VRM controller, repaired it and the laptop sprung back to life. The 5 blinks before booting persisted. I blame the content of Winbond flash as soldering on legs was visible and the content might be wrong. The correct serial number showed in BIOS, so I tried to do a BIOS update. The BIOS version was Q78 v01.07.00. It didn't accept newest update, so I tried the closest one to the old. I found v01.09.00. Content of the update was succesfully copied (progress bar finished), then error notification about the USB-C controller firmware being the same version as in the update file (which is fine), then reboot and infinite black screen with 5 blinks and fans on full speed. I tried various recovery procedures, none works. The laptop has the Sure Start feature.
I uploaded current content of W25Q256JV flash memory.
The serial number of laptop is 5CG9034328.
Any help is appreciated.Comment
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Can anyone provide the correct (or my repaired) BIOS for this laptop, please?Comment
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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 -
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 a Lenovo Thinkbook 15 G2 ITL i5 Laptop (serial number: MP2BFZEF) that when I turn it on, the led on the power button lights up for 5 seconds, then goes out. There's no display and nothing happens.
So I thought it was a Bios problem.
I found 3 bios chips on the board, which I read with a bios programmer: two XMC model bios chips and a Winbond model bios chip. Each XMC model bios chip has two partitions named XM25QH128A [3.3V] and XT25F128A [3.3V]. And the Winbond model bios chip has three partitions named W25Q80BL 3.3V, W25Q80xV 3.3V and W25Q80DV 3.3V.... -
Summary of BIOS Whitelist Removal Problem
Problem:
I am attempting to remove the WWAN card whitelist from my Lenovo ThinkPad T560.
Initial Findings:- My current BIOS version is N1KET58W (1.45).
- I have a CH341A programmer and have successfully created two full backups of my BIOS.
- I have the ability to use command-line tools on a Linux machine.
- I attempted to use several automated and manual patching methods on my N1KET58W (1.45) BIOS, including using hex strings. These attempts all failed.
- I concluded that the
08-12-2025, 03:01 PM
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