Newly built system. Initial start/boot pushed power button nothing. Pushed again started and everything fine. Computer running/booting well for 3 days but couple of times did the same thing (first push nothing second comes on everything fine). Thought maybe power switch on case was bad, but don't know how to test. Next day tried to turn computer on and got shock at power button (like ESD but not sure), still computer started but then shut down after a couple of seconds. Now computer won't power on w/switch. Swapped power and reset wires to see if it was switch but same thing. Turned PSU switch off, waited and then turned back on. Computer turned on for couple of seconds then turned off. Now when power is applied to PSU computer repeats this but turns off immediatly. Won't stay running. Changed MoBo battery, no change. Cleared CMOS, no change. Tried different (known good) PSU, no change. Removed everything one at a time, still no change. Came to conclusion MoBo fried, but no sure. Got RMA anyway. Decided to try PSU in good computer and experienced same problem!! Now I'm really confused. Got RMA for that too. Anyone have a thought on this? Don't know how to test processor, but REALLY hope it's not that. I'm stumpped... System: NZXT Apollo case, ASUS M2N-SLI AM2 NVIDIA nForce 560 SLI MCP Mobo, AMD Athlon 64 X2 5400+ 2.8GHz Socket AM2 65W Dual-Core Processor, ZEROtherm BTF90 92mm Silent UFO CPU Cooler, G.SKILL 4GB(2 x 2GB) SDRAM DDR2 800 (PC2 6400), XFX PVT84JUDD3 GeForce 8600GT 256MB 128-bit GDDR3 video card, Antec NeoPower 650W Power Supply, Seagate Barracuda 500GB SATA HDD, Seagate 320GB Ultra ATA100 HDD, Floppy, DVD Multi drive, 120mm fans front, rear and side. Any help would be appreciated! All MBoard standoffs in place ? ?
Did you remember to apply Thermal Paste ? ?

It's rare that 2 PSU's would be bad out of the box but i've seen stranger things with computer's...
Have you tried it with just one stick of RAM ? ? My first thought is that even at 650W you still don't have enough power.Hi Patio. Actually it was only one new PSU. The second one was from my other system and still works good in that computer. What I was saying is I removed the new one in the new system and tried the one out of my old system. It gave me the same results pointing to something other than the PSU. But what stumps me is that I tried the new PSU in my good old system and it experienced the problem in that system too, leading me to believe (possibly) the PSU had a problem that caused a problem in the new MoBo. I also did a nice job of the thermal paste and added new stands and new screws and was careful not to scratch anything. You really have to be careful w/these MoBo. One thing I didn't mention LOL, was that a couple days before we had an electrical outage while I had the system running. I think maybe possibly a surge eventhough I have (I thought) a pretty good surge protector. I'm thinking that when I get this thing back up and running I need a new surge protector and also a good UPS to protect this system. Newegg was good enough to RMA both PIECES (even paid shipping) so in about a week I should find out more. Thanks..

Also to address the issue of the 650 watts not being enough. I ran the advisory tools on Antec's site and also Thermaltech's site and even spec'd additional items that I have yet to add and both suggested 385 watts. That to me seemed LOW but I'm still quite a bit above that. This particular PSU has 3 12v rails at 19A @. The system ran well for a few days. The thing that I don't like about it ..it has an auto voltage detect that I don't trust. Thanks..Oh, also yes I tried a single stick of RAM. I actually tried removing everything one at a time all the way to just the MoBo. still same problem @ time. The 650W is plenty for that machine.
The reason the PSU may not have worked in the other box could be something not hooked up properly or that PSU is dead.
Good to hear newegg is RMA'ing it and we'll see how the new one is.

As i said PSU's dead out of the box from the better maker's are rarer than the 20 dollar specials but not unheard of.
Invest in another surge protector as some of them are only good for one bad hit and are un-reliable after that but a UPS isn't a bad idea either....
Sounds as if you took care assembling everything let's hope they'res a happy ending.Quote from: joefido on April 13, 2008, 05:00:01 PM

Newly built system. Initial start/boot pushed power button nothing. Pushed again started and everything fine. Computer running/booting well for 3 days but couple of times did the same thing (first push nothing second comes on everything fine). Thought maybe power switch on case was bad, but don't know how to test. Next day tried to turn computer on and got shock at power button (like ESD but not sure), still computer started but then shut down after a couple of seconds. Now computer won't power on w/switch. Swapped power and reset wires to see if it was switch but same thing. Turned PSU switch off, waited and then turned back on. Computer turned on for couple of seconds then turned off. Now when power is applied to PSU computer repeats this but turns off immediatly. Won't stay running. Changed MoBo battery, no change. Cleared CMOS, no change. Tried different (known good) PSU, no change. Removed everything one at a time, still no change. Came to conclusion MoBo fried, but no sure. Got RMA anyway. Decided to try PSU in good computer and experienced same problem!! Now I'm really confused. Got RMA for that too. Anyone have a thought on this? Don't know how to test processor, but REALLY hope it's not that. I'm stumpped... System: NZXT Apollo case, ASUS M2N-SLI AM2 NVIDIA nForce 560 SLI MCP Mobo, AMD Athlon 64 X2 5400+ 2.8GHz Socket AM2 65W Dual-Core Processor, ZEROtherm BTF90 92mm Silent UFO CPU Cooler, G.SKILL 4GB(2 x 2GB) SDRAM DDR2 800 (PC2 6400), XFX PVT84JUDD3 GeForce 8600GT 256MB 128-bit GDDR3 video card, Antec NeoPower 650W Power Supply, Seagate Barracuda 500GB SATA HDD, Seagate 320GB Ultra ATA100 HDD, Floppy, DVD Multi drive, 120mm fans front, rear and side. Any help would be appreciated!

I had this same problem the other night. Ironically I thought it was the motherboard as well but even after exchanging the board I still had the issue were I would turn it on and it would stay on for a split second then it would shut off. As a last resort I tried googling the problem and apparently it's a power consumption issue. Try removing your graphics card and see if it boots up. Mine did so then I knew it was isolated to the graphics card. It has something to do with the card consuming too much power too quickly so the PSU immediately shuts the power off the system. So yea try pulling the graphics card and see if it boots up. If that works then try getting an RMA for your graphics card or get a new one.