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
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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
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Re: Mobo cannot power on...
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
You step into the Road, and if you don't keep your feet, there is no knowing where you may be swept off to." Bilbo Baggins ... -
Re: Mobo cannot power on...
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.... =_=Comment
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Re: Mobo cannot power on...
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.Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - AnonymousComment
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Re: Mobo cannot power on...
Well idicator light showing Green LightComment
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Re: Mobo cannot power on...
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.Last edited by 999999999; 09-20-2007, 02:52 PM.Comment
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so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!!
what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing... -
HI I have a PC using a Corsair cx600 psu & ASRock B450 Pro4 mother board that won't power on after a shutdown (replaced a dead drive in a raid array) Not the boot drive.
With most things unplugged, including the 24 pin ATX connector, but not the ATX12v to cpu, I have +5.01V on the +5vsb pin 9 from the PSU. When I plug the 24 pin back in to the mobo, the +5vsb fluctuates between 1.1v & 1.9v.
Not sure where to go from here ?
Is the PSU at fault or is the mobo causing the problem
Look forward to any help :-)
If I plug the 24... -
Hi, everyone. First post of an actual repair. I'm a technician but a complete newbie with laptops.
So I got this Dell Inspiron to play with.
No charger, so I connected to my bench PSU.
The laptop also didn't include: hard disk (I added one of my own for testing, see below) and wireless PCB (but I doubt this could have anything to do with this particular failure).
------What it did (and didn't do)------
1) I turned it on and it powered on. Powered down in 2 seconds by itself.
2) Removed RAM, changed slot. Same... -
Greetings
My old 350W FSP-350GLN(80) PSU was working fine with my current computer for few years(and previously with few other computers as well). Nothing has changed in setup but since last few months I am getting problems while trying to boot PC.
What happens, is that PSU starts and I can hear fans, both PSU, CPU, MOBO and GPU. I can also hear HDD scratching and normal starting sounds. But DVI monitor claims that there is "no signal". Moreover, neither USB mouse nor PS2 keyboard does flash leds like it should do upon boot.
I have to turn PSU switch... -
Hey Forum,
I have a dead Acer Laptop from a friend. Find out that its a Mobo fault because Screen is working on other mobo and there are 19V on Power Jack that are going over the two Mosfets into the Mobo. So its actually charging too but no matter what i Do the leds wont come on. So i went over to the 5v and 3v Section and there is nothing at both. The 5v Rail is okay so no short but at the 3v Rail theres a short at PJ401 and on both sides from the Coil PL402 but on the capacitors there is no short. So i found a 19V 3.42Amps Charger (it works) plugged it into the Mobo and the Step...
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