Posted 14 September 2007 - 11:25 AM
Yesterday my computer - a Sony Vaio PCG-V505AP - was working fine all day, as always. At about sevenish I turned it off, but left it plugged in. When I came back to it at 9.30 it was dead. It's a mystery: I haven't dropped it, spilled anything on it, upgraded the hardware or even installed any new software.
When I press the power button, the power light turns on and the hard-drive indicator briefly flashes. Then the Sony logo is displayed, just as it used to. But then the PC just sits there with a white cursor blinking in the top left-hand corner of a black screen. The fan is on, as is the power light, but there's no hard-drive activity at all.
Here's what I've tried:
If I press ctrl-alt-delete it restarts and just does the same thing.
If I repeatedly press keys, it eventually makes a beep for every keypress. Otherwise it is silent.
I cured a previous death (in which it didn't power up at all) about a year and a half ago by opening up the case and cleaning it - the fan had got quite bunged up with dust. I tried doing the same thing this time but it had no effect at all.
The hard drive works fine when I put it in a different computer.
I removed the CPU and tried starting the machine. This time it showed the power-up light but then did nothing at all.
I have absolutely no idea what the problem could be. It doesn't seem to be the CPU, the power or the hard drive. Could it be the motherboard? I thought PCs just did nothing at all if the motherboard blew up.
Can anyone suggest a way of reviving it? I bought it second hand about two years ago, and I was just thinking to myself the other day that it's one of the best things I've ever bought.