ASUS A8N32-SLI won't power up

Computer has been working for about 10 to 11 months.

This weekend, I went to turn it on, and I got an error saying
something to the effect that I needed to insert a new boot medium, as
if it couldn't find my hard drive. I didn't have time to mess with
it, so I powered down.

Came back a couple hours later, everything worked fine.

The next morning, the computer wouldn't turn on. No power up, so the
monitors wouldn't come on either. Took the cover off the case,
powered up, everything was fine.

Then today, again it won't power up. So I started troubleshooting.

Power Supply? PC Power And Cooilng Silencer 470. Did the
troubleshootiong routine, short out the green and black wire on the 24
pin plug, and plug it in to the outlet. Powered up just fine by
itself. Put another Power Supply in the computer just in case, and it
wouldn't work. With both of them, sometimes when I'd hit the swich,
the fan would spin for less than one revolution.

Unplugged everything from the back of the case except the monitors (2
of them, unplugged the usb, etc..). Took out the SB XFI. Wouldn't
power up. Took out the memory. Wouldn't power up. Took out the
video card. Wouldn't power up.
Unplugged all my molex connectors. Wouldn't power up. Unplugged
everything but the CPU cooler. Wouldn't power up. Took a switch from
an older computer case, just for the possibility that the case swith
was bad no dice.

I've done all my 22 years of working with computer hardware has taught
me. Now I'm at a loss. Is my mainboard dead? I've never, ever, ever
had a motherboard die on me. I guess I could take the chip out and
see if it would beep at me, but I hesitate to do so, since I hate
dealing with thermal compound, and don't want to remove the waterblock
(liquid cooled).

Anyone have any suggestions? Thanks so much.


Not sure that it matters, but the chip is an Athlon 64 4600. I don't
suppose the other components matter, since the couple won't power up
even after I remove them.

In article <>, hoofhah2002
@nospam.yahoo.com says...
>
>
> Computer has been working for about 10 to 11 months.
>
> This weekend, I went to turn it on, and I got an error saying
> something to the effect that I needed to insert a new boot medium, as
> if it couldn't find my hard drive. I didn't have time to mess with
> it, so I powered down.
>
> Came back a couple hours later, everything worked fine.
>
> The next morning, the computer wouldn't turn on. No power up, so the
> monitors wouldn't come on either. Took the cover off the case,
> powered up, everything was fine.
>
> Then today, again it won't power up. So I started troubleshooting.
>
> Power Supply? PC Power And Cooilng Silencer 470. Did the
> troubleshootiong routine, short out the green and black wire on the 24
> pin plug, and plug it in to the outlet. Powered up just fine by
> itself. Put another Power Supply in the computer just in case, and it
> wouldn't work. With both of them, sometimes when I'd hit the swich,
> the fan would spin for less than one revolution.
>
> Unplugged everything from the back of the case except the monitors (2
> of them, unplugged the usb, etc..). Took out the SB XFI. Wouldn't
> power up. Took out the memory. Wouldn't power up. Took out the
> video card. Wouldn't power up.
> Unplugged all my molex connectors. Wouldn't power up. Unplugged
> everything but the CPU cooler. Wouldn't power up. Took a switch from
> an older computer case, just for the possibility that the case swith
> was bad no dice.
>
> I've done all my 22 years of working with computer hardware has taught
> me. Now I'm at a loss. Is my mainboard dead? I've never, ever, ever
> had a motherboard die on me. I guess I could take the chip out and
> see if it would beep at me, but I hesitate to do so, since I hate
> dealing with thermal compound, and don't want to remove the waterblock
> (liquid cooled).
>
> Anyone have any suggestions? Thanks so much.
>
>
> Not sure that it matters, but the chip is an Athlon 64 4600. I don't
> suppose the other components matter, since the couple won't power up
> even after I remove them.
>

Loooong shot. Replace the cmos battery. Make sure the cmos jumper is
making a good connection. I might be wrong but a little voice inside my
head says if the cmos jumper not making good connection < pins 1 and 2
of clrtc should be jumpered > it does funny things.

Check for pooched/leaking caps, check the power connections on the MB
for loose/burned pins.

Bill
--
Gmail and Google Groups. This century's answer to AOL and WebTV.

On Wed, 24 Jan 2007 20:57:51 -0600, phelper
<> wrote:

>The next morning, the computer wouldn't turn on. No power up, so the
>monitors wouldn't come on either. Took the cover off the case,
>powered up, everything was fine.
>
>Then today, again it won't power up. So I started troubleshooting.
>
>Power Supply? PC Power And Cooilng Silencer 470. Did the
>troubleshootiong routine, short out the green and black wire on the 24
>pin plug, and plug it in to the outlet. Powered up just fine by
>itself. Put another Power Supply in the computer just in case, and it
>wouldn't work. With both of them, sometimes when I'd hit the swich,
>the fan would spin for less than one revolution.


Is it possible that a screw has worked loose and is causing an
intermittent short? Try placing the motherboard on a piece of thick
cardboard outside the case.

I had the same problem just last week and did trouble shooting and parts
swapping just like you. In my situation it was the motherboard, and yes
I've never had a motherboard go bad. First time for everything I guess.

Works fine now. Good luck.


"phelper" <> wrote in message
news...
>
>
> Computer has been working for about 10 to 11 months.
>
> This weekend, I went to turn it on, and I got an error saying
> something to the effect that I needed to insert a new boot medium, as
> if it couldn't find my hard drive. I didn't have time to mess with
> it, so I powered down.
>
> Came back a couple hours later, everything worked fine.
>
> The next morning, the computer wouldn't turn on. No power up, so the
> monitors wouldn't come on either. Took the cover off the case,
> powered up, everything was fine.
>
> Then today, again it won't power up. So I started troubleshooting.
>
> Power Supply? PC Power And Cooilng Silencer 470. Did the
> troubleshootiong routine, short out the green and black wire on the 24
> pin plug, and plug it in to the outlet. Powered up just fine by
> itself. Put another Power Supply in the computer just in case, and it
> wouldn't work. With both of them, sometimes when I'd hit the swich,
> the fan would spin for less than one revolution.
>
> Unplugged everything from the back of the case except the monitors (2
> of them, unplugged the usb, etc..). Took out the SB XFI. Wouldn't
> power up. Took out the memory. Wouldn't power up. Took out the
> video card. Wouldn't power up.
> Unplugged all my molex connectors. Wouldn't power up. Unplugged
> everything but the CPU cooler. Wouldn't power up. Took a switch from
> an older computer case, just for the possibility that the case swith
> was bad no dice.
>
> I've done all my 22 years of working with computer hardware has taught
> me. Now I'm at a loss. Is my mainboard dead? I've never, ever, ever
> had a motherboard die on me. I guess I could take the chip out and
> see if it would beep at me, but I hesitate to do so, since I hate
> dealing with thermal compound, and don't want to remove the waterblock
> (liquid cooled).
>
> Anyone have any suggestions? Thanks so much.
>
>
> Not sure that it matters, but the chip is an Athlon 64 4600. I don't
> suppose the other components matter, since the couple won't power up
> even after I remove them.

On Thu, 25 Jan 2007 12:38:28 +0000, dinsdale wrote:


>
>Is it possible that a screw has worked loose and is causing an
>intermittent short? Try placing the motherboard on a piece of thick
>cardboard outside the case.

I thought so also... so I took the board out of the case... Still no
luck. Thanks for the idea.

On Thu, 25 Jan 2007 16:58:44 GMT, "Bill_Phillips"
<> wrote:

>I had the same problem just last week and did trouble shooting and parts
>swapping just like you. In my situation it was the motherboard, and yes
>I've never had a motherboard go bad. First time for everything I guess.
>
>Works fine now. Good luck.
>
>


So you did have to replace the motherboard? I'm afraid I will also.

CPU's essentially never fail unless you heavily overclock them. It
certainly sounds like your motherboard has died, based on those symptoms.

--
DaveW

----------------
"phelper" <> wrote in message
news...
>
>
> Computer has been working for about 10 to 11 months.
>
> This weekend, I went to turn it on, and I got an error saying
> something to the effect that I needed to insert a new boot medium, as
> if it couldn't find my hard drive. I didn't have time to mess with
> it, so I powered down.
>
> Came back a couple hours later, everything worked fine.
>
> The next morning, the computer wouldn't turn on. No power up, so the
> monitors wouldn't come on either. Took the cover off the case,
> powered up, everything was fine.
>
> Then today, again it won't power up. So I started troubleshooting.
>
> Power Supply? PC Power And Cooilng Silencer 470. Did the
> troubleshootiong routine, short out the green and black wire on the 24
> pin plug, and plug it in to the outlet. Powered up just fine by
> itself. Put another Power Supply in the computer just in case, and it
> wouldn't work. With both of them, sometimes when I'd hit the swich,
> the fan would spin for less than one revolution.
>
> Unplugged everything from the back of the case except the monitors (2
> of them, unplugged the usb, etc..). Took out the SB XFI. Wouldn't
> power up. Took out the memory. Wouldn't power up. Took out the
> video card. Wouldn't power up.
> Unplugged all my molex connectors. Wouldn't power up. Unplugged
> everything but the CPU cooler. Wouldn't power up. Took a switch from
> an older computer case, just for the possibility that the case swith
> was bad no dice.
>
> I've done all my 22 years of working with computer hardware has taught
> me. Now I'm at a loss. Is my mainboard dead? I've never, ever, ever
> had a motherboard die on me. I guess I could take the chip out and
> see if it would beep at me, but I hesitate to do so, since I hate
> dealing with thermal compound, and don't want to remove the waterblock
> (liquid cooled).
>
> Anyone have any suggestions? Thanks so much.
>
>
> Not sure that it matters, but the chip is an Athlon 64 4600. I don't
> suppose the other components matter, since the couple won't power up
> even after I remove them.

On Thu, 25 Jan 2007 16:11:40 -0800, "DaveW" <>
wrote:

>CPU's essentially never fail unless you heavily overclock them. It
>certainly sounds like your motherboard has died, based on those symptoms.

Agreed. Not only have I not overclocked my system, but it's also
liquid cooled. It's amazing to take the side panel off my case after
it's been on for hours and find the air inside the case is room
temperature, and even the heatpipes on the 7900GTX-OC video card are
pretty cool to the touch.

Tomorrow we'll try the CPU in another computer, just to rule that out.
But I would imagine, evena motherboard w/o a processer would still
power up and beep at me.


Thanks to all for the responses.