Computer Boot Problem

[XJJW]

So this is my first PC build, and I'm not having such great luck.

The computer turned on and then immediately turned back off.

LEDs, fans, and power supply all work for the time it is on, but then immediately shut off.

I have tried disconnection, and reconnecting components before starting, with the same result every time. There is no beeping. I have tried reseting CMOS, but to no avail. I have also checked power switch.

Any suggestions would be much appreciated! Thank you.

SYSTEM:
Processor: Intel Pentium 4 630 Prescott 800MHz FSB LGA 775 EM64T Processor Model BX80547PG3000F
MoBo: ECS PF22 Extreme (1.0) Socket T (LGA 775) Intel 955X ATX Intel Motherboard
Mem: Patriot 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) Unbuffered Dual Channel Kit System Memory Model PDC22G5300LLK
PSU: LOGISYS Computer PS550AC ATX12V 550Watts Power Supply

 

[ScrapSilicon]

Hello & Welcome to AnandTech forums !

click and read the mechBgon link in my signature line below...gl

 

[Bradtechonline]

Sounds like it's turning itself off to protect components. Check your CPU temp if it stays on long enough to let you go into your CMOS setup. Go to PCHEALTH, and make sure your CPU Temperature isn't overheating.

Also, make sure you plugged your CPU fan into the CPU fan connection on your Motherboard.
Post your CPU temps here if you do not know what is to hot.

 

[XJJW]

Unfortunately it is not staying on long enough to get any temperature readings.

 

[Bradtechonline]

First impression I get is overheating issue, or Power Supply problem. If you have another PSU handy might give it a shot.

Go on to Intels website and look at the LGA 775 installation procedures and make sure the HSF are installed properly. The LGA775 is kinda tricky, and a lot of people install it wrong but accident. Even experienced PC builders, I've done it myself the first time I tried.

Got on their site, and put the HSF back on and lowered my temps by almost 10c.

 

[XJJW]

Thanks, I'll try that. And you are right, it seems like it is turning it off in some sort of way to protect the processor. Yet all fans are connected and start spinning during the second or less it runs.

 

[Caecus Veritas]

make sure your mb (circuitry part) is not touching any metal parts, and that other components are properly seated. if you can't resolve the issue, strip down the computer to its bare minimum (mb + video card + ram + cpu) needed to post. if it still persists, i would take out the mb from the case and try again (by placing the mb on a paper box or something).

also, it's probably not a heat issue with the cpu as the computer will stay on longer than you described if it was indeed overheating.

good luck

 

[bnads]

thermal paste? one might forget yanno? lol just a suggestion :brokenheart:

 

[JoeFahey]

So how long does it stay on for? Do you mean just a matter of seconds?

 

[XJJW]

Less than a second.

 

[XJJW]

Still no go.

Now the mobo has an 8 pin power connector, yet 4 holes were covered up with a piece of removable plastic. My PSU came with a 4 pin and 6 pin connector which both fit this hole, but no 8. What should I do?

 

[ScrapSilicon]

Originally posted by: XJJW
Still no go.

Now the mobo has an 8 pin power connector, yet 4 holes were covered up with a piece of removable plastic. My PSU came with a 4 pin and 6 pin connector which both fit this hole, but no 8. What should I do?

atx12v location has that plastic plug(put it back) ..your psu 4 pin(should be square) is the one for that point.. p.s. that's on page 24 of your pf22's 81 page .pdf manual...

 

[XJJW]

Connected correct power, did everything aforementioned in this topic, still no luck.

Any more suggestions? They're always appreciated.

 

[Caecus Veritas]

when the comp turns off, do you hear a small buzzing sound coming from the PSU?

 

[XJJW]

No, it's more-or-less silent.

 

[XJJW]

I tried replacing PSU, still no luck.

 

[Caecus Veritas]

any update on this?

my first suspicion was that some part was causing the psu to short circuit...

i haven't troubleshooted a computer since the days when celerons were popular so i'm not familiar with your hardware - not sure if this is possible (can someone confirm this?) but can you try to power up using just the mb? see if the psu will stay on.. maybe connect the case speaker to see if you hear any beeps?

also, do you have any other spare parts to hotswap? like a mobo?