computer freezes in normal position but ok when lying on its side

[albevy]

computer freezes in normal position but ok when lying on its side what is causing this...I am at my wits end now I cant find any loose wires everything seems to be ok.. really strange this.. any help really would be appreciated

 

[Phillip Corcoran]

Make sure everything is screwed down properly inside. Drives, expansion cards etc, and especially make sure cable harness is fastened firmly with zip-ties so that no spare wires or connectors can touch something they shouldn't touch.