Dave <dave@gmailNOSPAM.com> wrote

> I have a PC that freezes whenever it is bumped or knocked.

You're not supposed to kick it.

> It absolutely freezes - no mouse movement, no keyboard response, no hard disk activity... nothing.

> Obviously the most likely case is a loose cable but I checked the cables and removed and reseated
> the RAM and it hasn't improved the situation.

> Anyone have any suggestions as to the likely cause?

There's two main possibilitys.

The most likely one is that there is an intermittent short to case
and the bump produces the short. The best test for this possibility
is to run the motherboard loose on the desktop and see if bumping
the case still produces a freeze. If it does, its a faulty power supply
with a poor connection or cracked trace etc inside the power supply.

The other possibility is a cracked trace or bad joint on the motherboard
itself. You may be able to work that out by tapping gently on parts of the
motherboard with an insulated something to see if that produces the
freeze. Unfortunately the fix isnt that easy if it turns out to be that.

> Could it be the motherboard coming into contact with the case when bumped?

Yes, that can certainly happen.