Many thanks!! 😊...

Unfortunately, I'm unable to download the file attached in #2. The download link returns 'Invalid File Specified' error.

Thanks for your response. I apologize for being unclear. There is no image on either the internal or the external monitor. However, the issue started after disconnecting the external monitor. The Caps Lock key lights up, but remains unresponsive, which leads me to suspect a boot issue. In addition, I was initially able to boot into the bios after performing powerdrains. This only worked sometimes and has now completely stopped working.

I have a similair issue (black screen after disconnecting from external monitor). I was going to try the bios in post #2 but cannot access it ("Invalid File Specified"). Any help is greatly appreciated! 😃

Model name: Yoga Slim 7 Pro 14ACH5 (Type 82MS - Model 82MS003TMX)
Serial number: PF31R0X6
Make: Lenovo
Board model number: HS45H NM-D691
CPU: R7-5800H
RAM: 1x 16G DDR4 3200...

Hi!

I work in a different field from electronics, but I like to tinker and have done a few hobby projects (a fluid bed coffee roaster for instance).

I am interested in learning about how to fix components and keep things working rather than replacing them. Right now I'm looking to get help with a Lenovo laptop that might have a corrupted bios, but I expect I'll be back with other questions down the line.

For now, I'm here to learn but it would be cool to be able to contribute and help other some day.

Cheers!