PC warned me about low power and now won't boot
A couple days ago my Media Centre PC warned me (in POST stage of boot up) that there was a low power issue. When I pressed F1 it then proceeded to boot so I didn't worry about it. Next time I booted it wouldn't boot, but all fans fired up etc but no BIOS etc. In fact the fan on the PSU went into "overdrive" (real LOUD)!! I figured it would be PSU so swapped out but now nothing. Have reset and replaced the CMOS battery, swapped out RAM and took out the Graphics card and used onboard VGA only. Now all I get is LED on mobo is lit and when I press the power button the light comes on only while the button is pressed - as soon as I release the power button the light goes off. No fans, no nothing. Anyone got any suggestions? Could it be that I need a more powerful PSU? (I only have a 250W for testing and the original was 240W). Do power supplies die slowly sometimes? I woulda thought that when they go - they just go.