KT2 Combo beeps and then powers down with XP2400

Question

Hi all I could really use some advice here.
I bought an XP2400 Tbred cpu for this system and it never worked. I ended up returning it since it I think it was DOA. But I wanted to confirm it. The 1GHz Duron I have in it runs perfectly.
This system has a 100/133MHz jumper so when I installed the XP2400 I first removed the old 1GHz Duron, I then cleared the bios and set the jumper to 133 and then turned it on. Upon booting up it beeped 2 times VERY quickly and then shut down. One normal beep and one quiet beep you could barely hear but was there. No matter what I tried that's all it would do.
I have an Antec SL350 which does 35 on +5 16 on +12 and 28 on +3.
http://www.antec.com/specs/sl350_spe.html
With only the cpu
2 sticks of 256MB PC133(I tried a single working DDR2100 stick as well)
NO drives connected
and an old PCI video card( I started with my FX5200 but went PCI to test)
I know the mobo supports up to 2600+ 266MHz bus but with the XP2400 it just turned on, never POSTED, beeped and then turned off. My other system, a K7TPro2, is chock full of gear and an XP2000 runs fine with a lesser supply.
Was the xp2400 DOA or is there something amiss in my system? Ie does anyone know what those two short beeps were. If my Power supply is indeed weak what should I go with? A Xp2100? Many thanks for any help here as I need to order a new cpu but I'm afraid I'll run into the same problem if i order another 2400.

Answer 1

Wow, thanks for all the quick responses.
Dr Stu, No ,100MHz made no difference and my K7TPro2(not A) would not support it. I have nowhere else to test it so I RMA'd it.
osnavi, as others pointed out its actually a decent power supply. I've seen plently of reports of people running this class and faster CPU on my Power supply, especially considering I stripped the board when I was trying it out. It is of course possible that my Antec has bad CAPS or is dying, but nothing else points to that.
Grayone, nice link. Your right, too bad it never stayed powered up long enough. At best it was one clear beep and part of a 2nd one, but that was it. It powered down within a few seconds every time I turned it on.
My main concern is which cpu to buy. Since this is my HTPC and its running Windows Media Center 2005 I wanted to get the fastest CPU possible. That's why a XP2400 seemed perfect. Now I guess I need to see if I can find an old XP2100 so at least I can cross test it in my other motherboard.
Still though, its always going to bother me that I'll never know if it was my motherboard or the actual CPU that was the problem. Thanks again.