No Beeps, No POST, now what?

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Was playing World of Warcraft the other night and went to plug in my headphones and a loud, annoying sound started and my system locked up. I could not alt-tab or ctrl-alt-del out of it so i hit the reset switch. Machine powered up but thats it, no beeps, nothing.

The MB is a ASUS P4P800 SE with a p4 2.4A Intel cpu.

Here's what I've tried so far:
- let it sit for a day, powered on, no beeps no post.
- removed ram, nothing
- put in a different cpu, a p4 2.4, with and without ram, nothing
- took board out of case with cpu and ram, nothing
- removed everything from Board (no cpu, no ram, etc), no different

Any suggestions?? I know a RMA is in my future, but I just want to see if any one else has some suggestions.

Thanks.

side note:
I also tried testing the p4 2.4a in my asus P4S8X board (which doesn't support 2.4A chips) and i got and loud, soft beeps (BEEP, beep, BEEP, beep, ...) i guess to let me know that the chip was incompatible but I dont know if that also meant that the chip is ok. ??
 
Sorry to hear that. I plug my headphones in the back while my ASUS A7N8X-X is on. No problem.

Your board has Intel 865PE Chipset, which is a good one. In my exp, the thing that is most likely gone bad is the mobo. Have you reset CMOS? Have you tried another PSU?

Yes, RMA it ASAP before warranty expires. I did that and it took about a month from the day I sent the board out. Don't lose your cool.
 
have you measured your Power Supply output? +3.3, +5 and +12V are the important ones.
 
Im not sure what you mean by measuring the power supply. How would I do that anyway? ;)

From the label, It's a 350 watt, ATX 12V raidmax power supply. And has worked fine for 6 months. Model number KY-450 ATX ATX 12V
 
Personally i dont like Asus Boards... they are expensive and they go bad quickly... try using MSI, Gygabyte as MoBo choices...
 
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