Dear all, I found this forum and this is my last hope. I had a problem with BIOS update though Windows Update - it was stuck for an hour and I decided to restart. Then it bricked. The reason to update was, I had no video on my panorama display. I tried to find a BIOS on my own, but it seems that Lenovo doesn't provide a complete file, only the BIOS section. Is there any chance someone could repair it? I did a backup from the chip, attached. I also tried using another BIOS, slightly different revision. It worked and even I had a display working, but then Windows tried to update once again and it bricked. (from this thread: https://www.badcaps.net/forum/troubl...54#post1601754 ). Should I provide anything more? Some steps to do? Many thanks!
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Answer selected by personanongrata at 11-03-2025, 12:33 PM.
Setting VPD information on System Board - ThinkStation P-series - https://support.lenovo.com/gb/en/sol...ation-p-series -
I am sorry for another reply, I couldn't find an option to edit my post. I managed to reprogramm BIOS, so the PC is working and seems to be everything okay, except of the serial numer. Could please anyone tell, how to repair it? Still, I will be really glad if someone could confirm, that this solution won't harm anything. Thank you.Comment
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Setting VPD information on System Board - ThinkStation P-series - https://support.lenovo.com/gb/en/sol...ation-p-seriesComment
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It worked. Thank you very much! In conclusion, it was safe to take BIOS from the mentioned post and program it to 30B8. Then I used your link to repair the missing information.Comment
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Hi!
Went dumpster-diving and found a bricked Lenovo P14S in trash, few weeks earlier. Symptoms - no screen, no POST, no beep, just keyboard LEDs flashing on powerup. Mute button+LED was responding though, and the display self-test was still working (via the key combo Ctrl+Fn+Power held for some seconds, see the Service manual).
Incidentally, Windows 11 have recently started auto-flashing computer BIOS in our region. Even more suspiciously, Lenovo has released a BIOS update just few days before the PC was trashed. About a week later, the BIOS update image has been oficially marked...04-14-2025, 01:56 PM -
Hello
I have downloaded a BIOS update tool from the Lenovo site 9dcn34ww.exe when I opened it in 7zip I saw a file called ZIWB2304.ROM which I assumed was the bios file and it loads into UEFItool. The issue is the file size, it is 10,101,992 bytes whereas the dump file I downloaded from the motherboard is 8,388,608 bytes why is there a discrepancy? Also, if I used a plain .bin file from Lenovo would that automatically update the pertinent information from the laptop on first boot? (or does the bios update tool do this?).
Thanks in advance
Matthew -
I have a Dell Precision T1650 MT workstation (of the following spec.) that was bricked yesterday when attempting to update the BIOS from A27 to A28 per:
- https://www.dell.com/support/home/en...-t1650/drivers > Dell Precision T1650 System BIOS
- Dell Precision T1650 mid tower Workstation
- Xeon E3-1225 V2
- 32Gb PC3-12800E RAM
- 4Tb SATA HDD
- motherboard: Dell part: 0C3YXR CN-0C3YXR-72200-39C-01GR-A02
I see now that others have experienced like issues e.g.:
- https://www.dell.com/community/Prec... -
Hi everyone,
My Lenovo Legion Y540 (i7-9750H, RTX 2060) bricked after I downgraded from BHCN44WW to BHCN21WW.
Laptop stopped booting entirely.
I used a CH341A programmer to dump the corrupted 16MB BIOS.
i then attempted the following:- Downloaded stock BIOS BHCN39WW from Lenovo
- Trimmed it to 16MB
- Extracted the BIOS region from the corrupted dump
- Extracted the BIOS region from the stock 39WW
- Replaced the corrupted BIOS region with the stock one (within hxd , opened the corrupted dump and replaced its region by the stock)
- Injected back my LDGB / DMI
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Hello,
I have a Lenovo Legion S7 15ACH6 that was interrupted during a BIOS update and is now bricked. Symptoms: fans spin, RGB keyboard lights up, but no display/POST.
The BIOS chip is a Gigadevice GD25LR128. I’m using a CH341A with a 1.8 V adapter. In AsProgrammer I selected GD25Q128 (since GD25LR128 isn’t listed) and successfully made a dump (BiosDump2_pf3eg12j.rar).
My understanding is that I’ll need a known good BIOS dump for this exact model, ideally matched to my laptop’s serial number (PF3EG12J), and that the Windows license key/serial should also...
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