It took a long time.
Thank you.
Based on the information you sent, the BIOS seems to be functioning normally.

However, I recently learned that there may have been a BIOS issue as well.

Actually, it seems to be a cold soldering issue in the CPU or somewhere else.

Sometimes the power turns on properly, but then it doesn't.

It seems to work about once out of ten times.

I think it's the "black screen not working" issue that's been trending on Reddit. I understand this symptom is something like a cold soldering issue...