Badie05

So last few days my PC has been acting about. About 3 days ago I turned on my PC and when I did this, the power LED blinked in the inital bootup but in a few seconds prompty turned off. The PC's fans were still spinning and the PC seemed to be still on but my monitor showed a black screen. I later hard booted the PC via the PSU. Switched it on then off a few times. This time the PC turned on. I thought it was nothing but now 3 days later after about 40 attempts or so my PC won't show anything on my monitor. It still spins up regularly but theres no signal and the LED is off.

PSU failure perhaps?

Edit:

Asus P5Q Deluxe
Intel Core 2 Quad Q9550
G.Skill 4GB PC2-8500 DDR2-1066
Antec P182
Seagate Barracuda 320GB + 500GB
Samsung SH-S203B
EVGA E-GEFORCE GTX 280 FTW 1GB
HT Omega Striker 7.1
Samsung T240 24'' 5ms 1920x1200 LCD
Logitech Z-5500 Digital 5.1 Logitech
G15 v2 Razer DeathAdder
Swiftech MCP655
Thermochill PA120.2
D-Tek Fuzion v2
1/2 Danger Den Tygon Tubing
Danger Den 5.25" Resevoir

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Aeogenia

Seems like a bad PSU indeed, do you have another to test your system?
Reset CMOS, remove all but one stick of RAM, unplug all unnecessary stuff (CD, CCFL, etc.)

Reboot... if this does not lead to any avail... its probably the PSU.

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Intel X25-V 40GB SSD review

Grammar or spelling mistakes? Notify me. So I can improve my English.

Legacy8500

Try using a different PSU if you have one. Borrow a friend's if you don't have a spare. If it still doesn't work with the new PSU you should remove every component one at a time a figure out which one went bad. Try taking out all of your RAM and put each stick in one at a time, etc etc.

pohtangina

make sure the 8 pin atx power is connected properly / other than the 24 pin...might have been pulled out. you can do the paper clip psu test. then use a multimeter and see if it is the PSU. Im not sure about eh p5q (I have the p5k which has a led power indicator ON the mobo) but you can check if it does have one too...suspects / PSU>vid card>mobo