MEGA 180 WONT START UP, HELP PLEASE.

I have a mega pc 180 and the first problem is the LCD wont work, Tried flashing it with no luck.
The main problem is after its been switched on for about 30 - 60 mins if i shut it down and leave it for about 5 mins it wont switch back on again, then if i leave it and try it the next day it will switch straight on.
The cpu temp is on 35 which is good so dont think it overheating. All i can think of is its a dodgy power supply or maybe the power supply is overheating.
When it wont switch on theres must be some power there as the HIFI led comes on green and i can hear the power go to the cdrom.
Any help would be appreciated, dont really want to package it all back up and send it back.
Cheers

When it won't start up does anything appear on the boot screen ? For instance does it detect video ? Does it detect CPU ? Does it detect memory ? Does it detect disks ? These all output info to the screen while the system is booting and can give a clue as to where the problem is.
Something to try the next time it won't start..... Remove the power plug from the walll...wait 10 seconds... plug it back in and see if that helps. Much easier than waiting 24 hours if it works. I have to do this a couple times a week. Although I have never found a repeatable sequence that causes it to fail. It never the less fails often enough to be a pain. And when it does fail the HIFI works just fine.
Good luck

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