Mark1981470

I recently built my new pc and everything seemed to be working fine, but i recently found a problem when going to actually turn the pc on.
When i press the power on switch sometimes nothing happens, sometimes i get odd flickers of power (cpu fan turns, case fans turn) other times it turns on fine.
The problem appears to be worse when the computer hasn't been off for a long time. e.g if its been off for a day its ok, if its been off for a few minutes, the problem occurs.

I initially build my pc with an athlon64 3800+, on a MSI K8N NEO2 PLATINUM 939 , but found that there was a conflict with the chipset and my Geforce6800 ultra.So i sent it back and ordered a ASUS A8V DELUXE 939 AGP but it wouldnt power up. I thought it might be shorting as it was a snug fit in my case, so i ordered a new case, my Thermaltake Soprano.

It still wouldnt power up so i thought the mobo was faulty so i ordered a replacement, which seemed to work great. But now im getting the power up problem. If i really mash the power button it usually gets it to work (high tech solution i know.)

I have everything connected correctly, with my memory in the correct DIMM sockets, there is nowhere where the mobo is touching the case, and i checked my cpu temperatures and mobo temps and everything was in the green.

My only remaining guess would be crappy power supply, but i never had a problem with it in my old rig. 480W.

Any advice would be hugely appreciated, its got to the stage now where im reluctant to turn my pc off at all.

Oh and if i posted this in the wrong forum i apologize but this was my best guess.


Mark.

dai

first check the power button by touching the 2 pins on the m/b that the switch connects to,with a paper clip or something similar and see if it boots straight away

Mark1981470

Update.

Ok had no problems over the past few days but went to turn my pc on today and nothing, not even a flicker of power. I took this opportunity to try the papaer clip thing you suggested, but nothing, no flickers either.

I then took my pc out and laid it on its side to see if i could see any problems, i tried powering up whilst it was horizontal and it worked fine. got it back in and no problems.

Now i know this looks like the motherboard is shorting somewhere but i can assure you i was so careful when putting the motherboard in the case. The only place it was touching the case were on the screw supports used to screw it into place, and i made sure there are rubber washers on before i screwed it into place.

this is really confusing me now, any ideas?

dai

if the screws go through holes with silver solder,take the washers off unless the manual specifically tells you to put them there

Mark1981470

ok will try that, thanks for the help dai.