No POST, computer stutters

Computer Forum General Hardware
1

Hey all,

I’m building a new PC and have been having trouble getting a post screen. First, I got none at all. Then, I thought my cpu fan might have been shorting the mobo to the case, so I took it off. Now when I turn the pc on, my monitor picks up a signal, there’s one beep, and then the whole pc shuts down. I don’t know what this beep code means (my mobo manual doesnt list them). Can anyone help? I don’t think it’s my power supply, its brand new and the 550 watts should be more than enough. Also, I doubt the processor is over heating since it only runs for ~4 sec (not enough time to get hot). If you need more detailed specs, let me know.

Thanks

UPDATE

there is a post screen, it checks stuff, and then says “bad cmos checksum - defaults loaded” then it cuts power. Sometimes it seems to stay on longer than normal, but never more then 10-15 seconds…

2

whats the make & model off your PSU (wattage doesnt mean much, check out B’s PSU sticky)

dont be to sure, although its probably the PSU

3

you CMOS battery is probably dead

4

thanks for the reply donkey!

my psu is an “ULTRA V Series ATX”

and for the cmos battery…it looks like a watch battery. Can I just go buy a replacement in the grocery store for $3? Or do the two batteries just look similar? Where would be the best place to get a replacement?

5

umm… I don’t think its the psu. I put in another psu that I’m 99.9% sure is working fine and I had the exact same thing happen. I’m pretty sure that donkey was right when he suggested cmos battery.

6

IT WORKS!!!

it was a combination of the old cpu fan shotring the processor to the case, and the cmos battery was bad. Thanks donkey!

7

sorry, i lost your post, glad you sorted it though