I found this in a Tech Support Forum, hope this helps!
Posted by: Vulcan498
First time posting and in need of help. At start up as soon as I push the power button I'm getting 3 beeps and a short pause then one other beep. I then get the Asus splash screen then my Intel raid screen and then my promise screen. One more short beep just as windows is loading. (I assume that this last beep is detecting my USB mouse.) Windows starts and runs good. On boot up my ram is showing 1gig installed. I have run memory test and it shows the ram as being good. I search for help on the web and everything I am getting refers to (Base Memory error) & or (Base Memory read/write test error) I have switched out each chip and ran them in every slot single and double. Same beep code is coming up. Is this the Ram or MoBo that is causing the problem on booting? How do I go about correcting this problem? I did have one response from Lee (@ ASUS Tec. Support) and he stated that this is the new bios and that the beeps were detecting my USB devices. The only problem is my mouse is the only USB device I have and I?m getting 3 BEEPS. Thank you all in advance for your help!
--------------------------------------------------------------------------------
Posted by: clintfan
Hi Vulcan498, and welcome to the forum!
I was going to say what Lee said, but having 1 USB device sort of negates that. The mobo does beep as it enumerates USB devices, and I also think there is now a BIOS setting which can turn that off (not shown in the manual).
In my opinion I guess if the system is running OK for you except for some extra beeps, and memory diagnostics show the RAM is OK, I would just ignore the beeps and treat it as "just one of those things".
One other thing you could try is to plug mini-headphones into the green Line-out jack at the rear (this assumes no front audio is attached, such that the original two FP_AUDIO jumpers are still in place). Repeat the problem while listening in the headphones. See if you get a "vocal POST message" explaining or confirming the problem. A BIOS setting, Advanced- Speech Configuration- "Speech Post Reporter", is also required to be Enabled.
Hope this helps,
-clintfan
--------------------------------------------------------------------------------
Posted by: Vulcan498
Hello clintfan1
And thank you for your response! I might need to take you up on your suggestion and just ignore the beeps and treat it as "just one of those things". I tried the Post message and the only thing I?m getting is a sweet lady telling me the operating system is starting. LOL Anyway this is the first system for me to build and I want to cover all the bases so I don?t run into and trouble down the road. I have added my specs so maybe if some might have any suggestions on the Beeps they can help out.
Thermaltake Xaser Damier V 5000 case
Aspire ATX-AS500W-12V PS
ASUS P4C800E Deluxe
Intel CPU P4/3.4CGHz 800M 478P/512K HT with a Thermalright SP-94 Heatsink
Asus Radeon 9600xt 128mb DDR
2 Kingston 512mb PC3200 CL3 ECC Ram (KVR400X72C3A/512)
3 WD HD 74GB 10,000RPM 8MB 2 on Intel raid 0 & 1 sata
1 Sony floppy, Sony DVD and Sony CD-rw
And XP Pro SP1a
--------------------------------------------------------------------------------
Posted by: Vulcan498
Update! After finally talking to someone with intelligence at Asus they are now telling me that my Bios are bad and I need to RMA my mobo. I also tried flashing them and it didn't help. So I guess we will see what happens in about 3 weeks when I get my mobo back

Thank you all for your help and I will return and let you know the outcome.