So, I finally got my hands on the twin of this Inspiron 3520 I was having BIOS issue with and extracted the BIOS file. I had the file applied to this laptop and it started right up. In case anyone will find this BIOS useful, here it is:

Model: Inspiron 3520 with a i7 12th Gen Processor
ST: F76Z554
MB# LA-L946P...

I reflashed BIOS using your unlock file and the computer is running without the password. I appreciate that. Thanks.

Hello, I have this Latitude 5340 2-in-1 with a BIOS password.

Please, help me unlock it. I am attaching both 16Mb and 32Mb BIOS files.

S/T: 66XFLY3...

OK, I reflowed the CPU and the computer is working again.

I think I understand why the computer is freezing on start. When the cpu is warm, on reboot the computer immediately freezes. If I let it cool off for a minute, on start I gain back the keyboard and the mouse for a little while. Both fans appear to be working. Is it possible, the heatsink is not making good contact with the cpu/gpu and this makes the computer to freeze?

Any pointers from the group would be appreciated.

I applied updated BIOS file. Unfortunately, no changes. Computer boots briefly and can stay in BIOS menu screen. I almost immediately lose the keyboard and eventually the mouse also hangs as well.

Perhaps, it is a CPU issue? I wonder if reflowing the CPU will yield success.

I have this Legion Slim 5 16APH8 which boots to Lenovo logo and I can also hit F2 and it will take me to system BIOS menu. However, after a few seconds I lose keyboard, external keyboard no longer works either and only mouse works for a while. Then, it also gets disabled.

I suspect corrupted BIOS chip.

Model: Legion Slim 5 16APH8
S/N: MP2FM2Q7
Motherboard#: LA-M811P

Original BIOS file is attached. Could someone, please fix the BIOS file for me? Thanks...

I reflashed the BIOS chip using your bin file. The Caps Lock key still lights up, then turns itself off, then comes on again. This time, the fan kicks in immediately but still no post. The fan was not kicking in before. I can flash different colors on the screen by holding "D" key while turning the computer on.

So, the issue is definitely corrupted BIOS. This one is just not working.

Hello, I have this Inspiron 3520 computer that starts up with Caps Lock turning solid, then after while it turns off and comes back again. The CPU gets really hot.
I suspect corrupted BIOS on this machine.

Please, help me fix the BIOS file.

Model: Inspiron 3520 with a i7 12th Gen Processor
ST: F76Z554
MB# LA-L946P

The BIOS file is attached. Thank you....

T14/T15 Gen 2 are notorious because of multiple variations of this motherboard. Most likely the error is generated by the EC chip because it is looking for a particular part# of the webcam+mic strip and it is not a match.

You have 3 choices at this point:

1. Do nothing. The error pops up and when you press Enter, you can continue to Windows.
2. Reprogram the EC chip to match the variant of your motherboard.
3. Order a new webcam+mic strip along with proper ribbon cable (the cable may be optional) to match the variant of your motherboard. This will match the...