Constantly restarting on power up

UnatcoAgent · Oct 4, 2006

ASUS a7N8x deluxe with an Antec Cold blue 350Watt

If unplugged / shut off from power computer will not restart, if left running no problems

On power-up computer restarts after 2 seconds, and continues to reset or simply shuts off

Power supply problem? No idea... havn't swapped anything yet

Rob

UnatcoAgent · Oct 4, 2006

Anybody?

Operandi · Oct 4, 2006

Solution = Seasonic, Enhance, Forton-Source, Zalman (Forton OEM), or PCP&C.

Slammy1 · Oct 4, 2006

I'd tend towards PSU as well. You have the greatest energy draw on some rails during startup as you spin up HDDs and such. Cold boot issues are usually indicative of PSU problems. You might try unplugging everything you can to see if the problem persists, then plug back 1 unit at a time. Changing order will show if it's draw or failing component.

dBTelos · Oct 4, 2006

What video card and CPU do you have?

UnatcoAgent · Oct 4, 2006

Originally posted by: dBTelos
What video card and CPU do you have?

Radeon 9800 128 and a 2500+ barton running stock settings

I've tried unplugging everything except the motherboard, still no dice

pkme2 · Oct 4, 2006

It's PSU replacement time. Get A Seasonic S-12.

GalvanizedYankee · Oct 4, 2006

Bad capacitors on the mainboard or in the PSU can cause these types of problems.
Do you have an Antec SP or TP over three years old?? http://www.badcaps.net/ident/

If you have a spare PSU...Install it for a diagnosis.

...Galvanized

UnatcoAgent · Oct 5, 2006

Ok I'll try a new PSU and hope it's not the mainboard

thanks guys!

Slammy1 · Oct 5, 2006

It's a bit disconcerting that it happens even under minimal conditions, but runs fine when you can boot? Was this a gradual or sudden failure? Was there a time when the system ran fine, but now it doesn't? Sorry for all of the questions, but I was hoping for something definitive that would point to a single component being the cause. Definitely check your capacitors, see if anything looks blown, swollen, or leaking. Yes, listen to the cow.

UnatcoAgent · Oct 5, 2006

Originally posted by: Slammy1
It's a bit disconcerting that it happens even under minimal conditions, but runs fine when you can boot? Was this a gradual or sudden failure? Was there a time when the system ran fine, but now it doesn't? Sorry for all of the questions, but I was hoping for something definitive that would point to a single component being the cause. Definitely check your capacitors, see if anything looks blown, swollen, or leaking. Yes, listen to the cow.

This has been a gradual thing. Once the system manages to actually boot up, everything is fine. It takes me unplugging everything, replugging in, or a combination of different things plugged in and it will eventually work.

I will check the capacitors for sure

Thanks

GalvanizedYankee · Oct 5, 2006

You MUST open the PSU for a look-see. 0_0
Over 80% of the PSU complaints on this board are Smart/TruePower units.
33% of all failure to boot or instability problems are PSU related.

As caps dry out, they will only do thier job well when warm.
If your issues are worse when cold the above is a VG bet.

...Galvanized

UnatcoAgent · Oct 6, 2006

Originally posted by: GalvanizedYankee
You MUST open the PSU for a look-see. 0_0
Over 80% of the PSU complaints on this board are Smart/TruePower units.
33% of all failure to boot or instability problems are PSU related.

As caps dry out, they will only do thier job well when warm.
If your issues are worse when cold the above is a VG bet.

...Galvanized

Do those include the caps on the motherboard as well being cold? (newb at caps) I'm worried it's actually the mobo, can't test yet not back in city.

GalvanizedYankee · Oct 6, 2006

I gave you a link. Please read that page.
Yes. Mainboard caps can dry out over a period of years. Teapo caps can go bad w/o physical signs, so can some other brands. Techs will warm up mainboard caps with a hair dryer to get it to POST/BOOT. This is just a diagnostic step prior to repair.

I have a 5 year old PSU that will go out of spec when ambients are 16~19C. The 3.3V will drop to 2.4V causing RAM malfunctions. This unit was changed out last year. This was what really got my interest directed at repair on the componet level. Once warm the PSU functioned very well. Weird huh?

Caps may not be the cause of your problems but they should not be over looked or discounted.

...Galvanized

Slammy1 · Oct 6, 2006

I'd say at this point indications are bad PSU as well.

UnatcoAgent · Oct 6, 2006

Originally posted by: GalvanizedYankee
I gave you a link. Please read that page.
Yes. Mainboard caps can dry out over a period of years. Teapo caps can go bad w/o phyical signs, so can some other brands. Techs will warm up mainboard caps with a hair dryer to get it to POST/BOOT. This is just a diagnostic step prior to repair.

I have a 5 year old PSU that will go out of spec when ambients are 16~19C. The 3.3V will drop to 2.4V causing RAM malfunctions. This unit was changed out last year. This was what really got my interest directed at repair on the componet level. Once warm the PSU functioned very well. Weird huh?

Caps may not be the cause of your problems but they should not be over looked or discounted.

...Galvanized

Alright, thanks for the explanation. Very interesting actually, it will be kind of fun to try and figure this out if it's not the PSU. It will have to wait as I am recoverying from wisdom tooth extaction right now, bleh!

Thanks again guys I will update once the PSU is swapped.

dennilfloss · Oct 8, 2006

One can also try one's memory at 2T instead of 1T. That solved a similar problem for me.

Engineer · Oct 8, 2006

Originally posted by: GalvanizedYankee
Bad capacitors on the mainboard or in the PSU can cause these types of problems.
Do you have an Antec SP or TP over three years old?? http://www.badcaps.net/ident/

If you have a spare PSU...Install it for a diagnosis.

...Galvanized

BINGO!

I was going to post this...as I do have experience. Leaking caps on my mainboard. Replaced them and all was well (Several years ago).

gamer30168 · Oct 8, 2006

I recently had nearly the exact same problem....even had the exact same PSU....about 3 years old....bought new Antec SP-500 watt today...problem solved....for the time being

UnatcoAgent · Oct 10, 2006

Yup it was for sure the powersupply, swapped in a 300Watt I had lying around and everything is gold now.

Thanks guys!

GalvanizedYankee · Oct 10, 2006

Originally posted by: Sabot
Yup it was for sure the powersupply, swapped in a 300Watt I had lying around and everything is gold now.

Thanks guys!

Thanks for coming back and giving this thread closure with the solution.
Most of us do have a spare PSU

Constantly restarting on power up

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