I sold a computer to my girlfriend with an Intel i7 with an Intel Motherboard DX5SO, actually works pretty well until some while ago.... about two months ago, the computer didn´t boot, the fans and the lights were on but the computer didn´t boot, so I was only one step in returning the mother board for warranty until I changed the power supply and it worked perfectly, but there on, the computer suddenly shuts down without a warning or without the blue screen of dead, it just shuts down, immediately turn on, make a rare noise and then boots again...
This is what I have done so far:
The power supply was 500W and I changed it to a 800W and the problem persists.
I don´t think it is a heating problem because sometime the computer is turned off for about an hour, and sometimes it doesn’t last even a minute, and sometimes it lasts 1 hour or more.
I installed Intel Desktop Monitor (or something like that) which tells me the temperature of the ambient, and processors, the thing here is that the temperature of the processor is at 99ºC (210 F) and doesn’t move, I think this information if false, I don´t know where he´s getting the processor temperature.
I don´t know if it a static problem of the mother board is not working properly and I have to return it... what do you recommend?
The last thing I did was to take out 2 of the 3 memory sticks and loosen a little bit the motherboard bolts, and after this the computer hasn´t shutdown.