No video, no post, no beep,

ASUS m2npv vm.

3+ years of no problems.

About a month or two ago, this happened. After several cold reboot attempts I was perplexed. Left the machine alone for several hours to half a day. Then returned to it started fine. With no ill affects.........other than planting a seed of anxiety in my mind about impeding failure.

Then 2 days ago it happend again.......but no troubleshooting has resolved it or even advanced the problem

I have reseated all memory. Including booting with no memory.......I get no beeps.

The green light on the mb is lit solid green. I've reseated the video card also......nothing. Same result.

NO video, no post, no beeps.  The fan on the cpu is working fine and spinning away. The light on the motherboard is solid green.

No bulging capacitors in evidence.  

Reseated video card. No change.

Reseated wired NIC. No change.
Reaseated wireless nic. NO change
Scott YeahRightGoodGuyAsked:
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Sounds like a possible motherboard issue. No post is usually indicative of bad memory, dead cpu, or bad motherboard in my experience. Since you're obviously getting power to the system (green light, etc.) and the fan is coming on, those would be the three things I would focus on.
it should be problem related to the power supply. Can you check that by replacing the power supply with another working one?
Scott YeahRightGoodGuyAuthor Commented:
But the power supply is working fine. No indication that its bad.
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it may seem to be working but the voltage levels should be less or high.. if you have a voltmeter you may check the output voltages...

Kick out RAM and graphics card. And try to power up your system. But BE SURE that the case speaker is well connected. Now  mobo MUST beep.

In case if you don't hear any beeps, than your Mobo is dead in my opinion.

Again I would like to step on speaker as it is vital before deciding that mobo is dead or not. If it is not well connected, you may take wrong decision.

Change 'motherboard issue' to 'capacitor issue' and you'll have named the problem.
LIKES to use OST brand, which is notorious for failing with no bloating.
Sometimes uses Chemicon KZG series which can also fail with no bloating.
A board that age may have Nichicon HN and/or HM serie caps which were defective from 2001-2004.
Here my troubleshooting procedure :
Precautions :
-During connecting or disconnecting devices, be sure to have the AC removed
-Temporarily ground yourself, or use a wrist strap for ESD prevention

-With a new motherboard : verify if all mounting standoffs correspond with the holes in the mobo !!
   Or test the motherboard outside the case, on a wooden  (non conductive) surface
-Clean the system from dust, then  test with the minimum setup - disconnect also all peripherals and network cables :
-What to connect :  only  motherboard + CPU + 1 ram stick, video card, power supply
-Verify that the 4-, 6- or 8-pin CPU Aux power plug is connected
-Verify that the VIDEO card has a power connecter - if yes, connect the power to it !
Now power on  your PC : on boot, do you have a display?
-if NO it is one of the connected: RAM, Power supply , video card or monitor, so if possible swap ram, Power supply, video card or monitor - leaving only motherboard and cpu
-if YES, connect devices till the problem shows
*** note : if the fans are running, this shows there is 12 V present from the Power Supply; this does not mean the PS is ok, you still need 3.3 V and +5 V as well; and other signals.
Additional tests and things to try :
-boot without ram, it should beep; (also, without video card)
-try bios default settings, (if possible) or clear the bios by removing AC and bios battery
-renew the CPU heatpaste, and verify that the heatsink is mounted flat on the CPU, allowing for a good thermal contact
-you can also check the motherboard for bad capacitors as shown here :

The term POST refers to the Power On Self Test  procedure - here a link  with a short explanation
Scott YeahRightGoodGuyAuthor Commented:
I have removed the cmos battery and reseated and.......changed the mb jumper to default for the cmos.

Problem continues.
Scott YeahRightGoodGuyAuthor Commented:
Can anyone point me to the specific URL (not just for the manual on this mb.
Scott YeahRightGoodGuyAuthor Commented:
You pointed me to a place I could find it.......but your URL is not  correct.

This is ....
That's the link in the page I pointed you to.
I did it that way because Asus's site isn't coded to standards and some browsers have trouble with it.
Scott YeahRightGoodGuyAuthor Commented:
I've taken it in to the local repair shop. There are some things I just can't test throughly without the time and parts.

I just don't want to buy a new MB if it turns out to be the processor or something else less expensive.  I know this is always a calculated risk.  But were talking small dollars here. Its just got me perplexed.
Scott YeahRightGoodGuyAuthor Commented:
It was the processor. Not the board.

That's incorrect.
MiniDevo called out bad CPU 13 minutes after the question was posted.

ID:26125569  Author:MiniDevo  Date:12/26/09 03:23 PM
Scott YeahRightGoodGuyAuthor Commented:
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