My first 386 computer. Built in the computer shop I worked in.
It wouldn't boot if you tightened the screws on the case.
Solution: Don't tighten the screws on the case.
It wouldn't boot if you tightened the screws on the case.
Solution: Don't tighten the screws on the case.
Solution: Move the HDD such that tightening the screws doesn't bend the SATA cable out of making good contact!
The worse version is broken in-board signal paths.
Both ultimately result from mechanical distortion.