Here are some signs that your laptop may have a BIOS issue:
Beeping: When you try to turn on your laptop, it emits a series of beeps, called BIOS beep codes. Each beep code indicates a different hardware component or configuration error. To interpret the codes, you can look up the manufacturer's website or manual.
Startup issues: Your laptop has trouble starting up, or it doesn't boot at all.
Screen issues: Your laptop turns on but the screen remains black.
Temperature issues: Your laptop thinks its temperature is too high.
Compatibility issues: You've recently installed new hardware that's causing compatibility issues.