Power on if forced, but motherboard off

April 9, 2010 at 17:24:34
Specs: Windows XP, dual 2.2GHz / 4Gb
A small mystery here. My computer (Asus Crosshair I Gaming) has begun to randomly shut down and crash lately, and now this morning it won't turn on at all: no fans, nothing. I read through quite a few posts relating to "computer not turning on" by the way, and did what they recommended:

-> I tested the power switch
-> The power supply voltages are correct when the MB connector is off, and I activate the PS by shorting pin 15-16 of the connector. All fans turn on in the computer in this case.
-> I shorted the pins WHILE the connector is in the MB: the PS does turn on, but no BIOS screen comes up
-> I tried the small power switch on the MB.

Nothing results in a boot up.

If there's a thermal problem, would the computer "remember" this and not want to turn on?

Any ideas as to what's going on?

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April 9, 2010 at 18:50:45
Give us the manufacturer and exact model number of your power supply; also the amps rating of the +3.3v, +5v, and +12v rails.


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April 9, 2010 at 19:25:56
It's a Hiper Type R 730W.

3.3V : 24A
5V : 28A
12V1/V2/V3/V4 : 16A
-12V : 0.5A
5VSB : 3A

Many LEDs on the MB are on when the PS's back rocker switch is turned on, but powerup is not possible. Before dimming out on switch-off, they get brighter for about two seconds when the power supply's rocker switch is turned from On to Off.

The PS fans turn on when jumpered manually, but this doesn't actually turn on the computer.
This ran for 2-3 years or so on this PS.

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April 10, 2010 at 16:56:34
Anyone need any other info?

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