Question about ASUS M2N-E SLI (M2N-E SLI GREEN) Motherboard

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Hello, after about one year of well working this mobo starded giving problems. Now, when i turn on my PC the green power light on the mobo (sb pwr) is on as well as the green led on the case. The CPU (ATHLON 64 X2) and PSU (BITROM 500W) fans work, but the screen is black, no beeps, no POST, no BOOT, the mouse works but the keyboard not. I cleared the CMOS by the jumper (CLRTC) and tried to reset also the KBPWR jumper. I tested the system without the VGA (ATI 1950 PRO 256 MB), without the sound card (creative), without RAM (TWINMOS PC2 5300 CL5 512 MB X 2) but nothing. I'd like to reset the BIOS (in the past I solved in this way the same issue on another mobo) but i don't know if i did it by clearing the CMOS or not and what's the right way to do it. Can you help me?

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1) You can just use C.P.R. (CPU Parameter Recall) to reset BIOS back to the factory default settings, as well as the CLRTC jumper. (Clear Real Time Clock. Another way of stating clear CMOS)

You may had luck in using this method on another mobo, but IMHO it isn't the problem/solution for this puppy.
I think you have a bad Power Supply with a weak voltage power rail.
Enough power to light LED lights, and spin fans, but not enough to turn the Processor on.

1) ALL the LED lights combined use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can consume 51 to 125 Watts of power. (Maximum) Depends on what Processor it is.
The Asus M2N-E SLI mobo has an AM2 processor socket, and can use AMD processors that consume a lot of wattage.

No Processor operating, No computer.
No computer operating, there is No Video Signal to the monitor.
(No Signal)

Do you have a KNOWN to be good, compatible Power Supply, to use for a test unit? Perhaps there is an unused computer. Maybe someone has upgraded to a better computer, and there is an unused one.

Posted on Nov 07, 2010


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