No Signal to Monitor

June 6, 2011 at 20:14:18
Specs: Ubuntu 11.04

I assembled a computer a few months back and everything was working beautifully. I had turned my computer off for about a week and when I turned it back on it was not sending a signal to the monitor. I had it plugged into an hdtv, so I tried a traditional vga monitor, still no signal. I tried another traditional vga monitor I had in my house with the same problem.

The motherboard is past the three months I had to replace it (after having replaced it once before). I have no external video card (just the onboard video).

The computer specs are as follows:

-2x 1GB DDR3
-AMD64 sempron single core 2.8 GHz AM3
-ASRock 880GXH
-APEX 500w ATX 12V PSU
- ATI Radeon HD 4250 (On board)
-1x 1TB HDD
-1x 500GB HDD

As I said it was working but when I tried to turn it on again it suddenly gave me no signal to any monitor I plugged in. If I had an extra computer laying around I would attempt to test all my parts until I found the culprit but seeing as this is the only tower in my house, I don't have that luxury. I would send my parts back but the only parts that are replaceable at this point is my psu.

I have read elsewhere that the psu could be the problem so it may be worth replacing the psu in case something happened to it.

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June 6, 2011 at 20:17:23
On another note, the fans, cpu, hdds and keyboard/mouse all have power (even the external hdd that I plugged in briefly had power to it). I have a feeling my onboard video card may have went kaput rather than my psu but then again...stranger things have happened...

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June 6, 2011 at 20:28:45
The power supply has 3 main voltage rails - +3.3v, +5v, +12v. Anyone of them may have gone bad. It doesn't take much power to spin a few fans or light a few LEDs. I hate to hear of people guessing without testing, then just randomly replacing parts until they hit on the right one. That's not good for anybody.

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