Mobo cannot power on...

[wan901]

Hello guys... i like to ask you guys about motherboard..i had a Asus A8N-SLI the problem is cannot powered on .....but the light indicator was on ....is it the crystal or mosfet or caps problem ?? hope u guys help me out :P

[starfury1]

humm more info would be helpful.....

By light indicator do you meant the one that possibly exists on the MB?

Have you tried another PSU?

I dont know the board but from a quick search it appears to be a newish one so caps would be far less likely.

What were the conditions of failure...was it working and just died or is this a new build (re build)
is it being overclocked or did you do some upgrade and now it don't work.

you may be real unlucky and the Mb has died, hope not

more info would help narrow the field a bit as to a possible cause

Also whats in the box with the dots

[wan901]

Well ,yeah the mobo was working before this happen....nope im not overclocked it....yup its suddenly died when i open at the morning....yeah i tried with the other PSU already ....and i didn't see any caps failure.... =_=

[stevo1210]

What brand was the original PSU? What colour is the light on the motherboard? Red or green? I have an Asus P4 series motherboard here killed by a faulty PSU and now displays a red lgiht instead of the usual green light.

[wan901]

Well idicator light showing Green Light

[999999999]

A few random suggestions (meant to be tried in this order?).

1) Disconnect AC power for a few minutes.
2) While you're waiting, clear CMOS or remove battery for this period then reinstall battery.
3) Try to power up system.
4) Check PSU voltages while attempting to power system.
5) Check function with a PCI video card instead of AGP or PCI Express
6) Does it have a floppy drive? If so, is it trying to access it as if it's wanting to be fed an emergency bios flash disk?
7) Are you certain the replacement PSU has suitable capacity and is in proper working order (not a very old, generic brand, or low wattage rating?)
8) Strip system down to bare minimum parts required to POST. 1 memory module, CPU, heatsink/fan, least power hungry video card you have (If PCI, even better). Disconnect drives, everything else - the goal is only to get it to POST and proceed from there adding back parts one at a time.

What do you mean by "it suddenly died"? Was it running and it shut itself off, or did it fail to turn on from having been previously shut off (manually)? When you try to turn it on, what exactly happens? Does the PSU fan run, does that fan even move a slight bit (looking at it while pressing power button)? Do all the fans and LEDs, drives spinning, etc, but it just doesn't POST, or ???

A crystal problem is very unlikely. A mosfet problem is also unlikely, and if the caps don't look vented that is also unlikely. They might not be impossible but playing odds, it would be better to look elsewhere instead of focusing on these things at present.