[jbolt]

This computer has been running fine for about 2 years. I normaly I let the machine run 24/7. A few days ago the PSU fan started making noise and I had some lockups. I had been powering it up only long enough to check my email until I could replace the PSU. Last night I started having some video lag so I shut it down and today put in a new PSU. When I hit the power buttom the fans came on along with the power lights but the MB does not post. Thinking it might be a bad PSU I exchanged it but no luck. Could the old PSU have killed the MB? Any ideas?

Thanks,

A7N8X-D
AMDxp3200
180g HD
1gig RAM
Radoen 5600
CD-RW
DVD-RW

 

[Tumbleweed36]

Hi,

What brand and wattage power supply did you put in and also, what was the old one that worked for quite a while before it quit.

 

[jbolt]

Old psu came with the case- Antec 380w.

New psu is an Antec smartpower 500w

 

[Tumbleweed36]

Hi,

If it worked the last time you had it on, probably did not fry the motherboard (and you know, there are never any guarantee of that) as a rule.

It almost sounds like you either dislodged something when putting it together or maybe disconnected something if you took it out. How much did you disassemble when you took it apart.....what did you take out to put the power supply in?

Both supplies you have listed are great supplies.

Before you answer, try only one stick of ram and see if that helps. Reseat your video card and see if that helps. Are you sure you got the 12 volt square molex connected up when you put in the new PS?

 

[jbolt]

Just to be clear when I power up the computer other than the fans and the power LED on the MB coming on nothing happens. No beeps, no screen activity, no HD activity, nothing, just blank screen.

There is only a 20 pin ATX power connector on this MB, no 4-pin. Even if the board was bare when powered up it should at least try to POST?

Just for giggles I reset all the connections but still nothing.

Jay

 

[Tumbleweed36]

Hi,

That is strange since it worked when you changed the PS. Take out both the video card and ram and see if it beeps at all....make sure you have the audio header connected. If nothing, put them both back and and clear the CMOS and see if that gets you anything or any change of behavior.

 

[jbolt]

I pulled the MB and stripped it bare, cleared the cmos. MB shows power and switch triggers the PS but still no POST no beeps. Looks like the MB is toast.

Thanks for the help.

 

[Tumbleweed36]

Hi,

Certainly sounds like it. One last thing, pull your CPU and heatsink out, then put it back in and don't forget to plug the fan back in.....Make sure that they are clamped down very tight......see if this might help, like there might be a place that is not making a connection. What can you lose by trying? Also, while you are at il (experimenting), try shorting across the on/off swith pins on the front panel header....Then, try reseating the ATX plug........again, what can you lose?