PC just reboots or switches off for no reason?

[Dave_ST220]

Memory replaced with all other H/W when upgraded Fault apparent before and after.

[onlynik]

Dave_ST220 said:

Memory replaced with all other H/W when upgraded Fault apparent before and after.

Poor software coding?

[CLK-GTR]

does it make any noises when it starts up and fails?

bad memory would usually prevent it from getting past BIOS, but not always. most likely is a bad power supply, see if you can hook it up to another PSU, and make sure all the fans are working properly. Take the side panels off and have a look.

[Dave_ST220]

onlynik said:

Dave_ST220 said:

Memory replaced with all other H/W when upgraded Fault apparent before and after.

Poor software coding?

Weird thing is once it has powered off it will refuse to even boot into windows, it will do this three times(i think) and then load windows fine!

[rumpelstiltskin]

CLK-GTR said:

does it make any noises when it starts up and fails?

bad memory would usually prevent it from getting past BIOS, but not always. most likely is a bad power supply, see if you can hook it up to another PSU, and make sure all the fans are working properly. Take the side panels off and have a look.

When it starts up and fails there are no 'strange' noises,just the lack of the usual hard drive working sound.Fans are all ok.I'll try and get a hold of another PSU.

[CLK-GTR]

rumpelstiltskin said:

CLK-GTR said:

does it make any noises when it starts up and fails?

bad memory would usually prevent it from getting past BIOS, but not always. most likely is a bad power supply, see if you can hook it up to another PSU, and make sure all the fans are working properly. Take the side panels off and have a look.

When it starts up and fails there are no 'strange' noises,just the lack of the usual hard drive working sound.Fans are all ok.I'll try and get a hold of another PSU.

Not sure if you've already covered this but the hard drive hasnt packed up has it?

[rumpelstiltskin]

Well if the hard drive had packed up i wouldn't be typing this now!;)

[jimmyjimjim]

Might be on the verge of packing up. Anything in the system log?

[The Moose]

Have you looked at:

Microsoft Info

The Moose