[iammykyl]

Gday to you all.

A build for my wife, 4 months old and hardly used.
2 weeks ago, 6 random reboots, 2 at boot, 2 whilst browsing, 2 with the computer sat idle. NO BSOD just reboot and then OK.

Main components.

Mobe. GA-EP45-UD3LR.
CPU. Intel Q4800 Core2 Quad, 2.66 GHz, Noctua cooler.
Ram. Corsair Twin2x4096-C4DHX. PC-6400.
Video. Asus EAH 4830.
PSU. Antec TP. 550Watt.
OS. XP, SP3, fully updated Comodo, AVG, no unusual software.

Computer was not used for a week, went to start, no response at ail.

Checked, the wall socket, OK.
Lead to the PSU. OK.
Opened the case and tried a boot.
No beeps. No fans. No signal to the screen.

The only lights on the Mobo are for CPU load, so no way to see if there is power to the board.

Shorted out the power pins on the Mobo front panel header, no response so assume the case switch is OK.

Q. Even if I have a faulty component on the Mobe, Should the PSU, fan spin or I would get a beep?

Q. As I do not have access to a spare PSU, is there anything else I can try, before i start pulling the system apart?

Thanks for your time.

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You can try the old PSU test method.
Sense its only 12volts.

Grab a paper clip, and put one end into the green end and one end into the black end see if the psu turns on.
I seen it done in front of me by my schools tech.

8D
Poor mans PSU tester.
But first things first.
Are you sure its plugged in.

/IT crowd humor.

[TheWhiteRose000]

You can try the old PSU test method.
Sense its only 12volts.

Grab a paper clip, and put one end into the green end and one end into the black end see if the psu turns on.
I seen it done in front of me by my schools tech.

8D
Poor mans PSU tester.
But first things first.
Are you sure its plugged in.

/IT crowd humor.

[iammykyl]

Hi.

Yes, everything plugged in. Also checked all connection and seating of ram etc.

Q. Green and blue ends where? On the 24 pin plug?

Edited by iammykyl, 02 May 2010 - 11:22 PM.

[TheWhiteRose000]

Green is the ground thats Universal
The other is black try connecting the two with a paperclip.

The PSU should turn on.

[phillpower2]

Hi iammykyl, see link below & please note

Green is the ground thats Universal

is a mistake
http://www.smpspower...rs-pinouts.html

[TheWhiteRose000]

zomg.
I guess it varies with power supplies.

o.0
Learn something new everyday.

So have you tried getting it on yet?

Edited by TheWhiteRose000, 03 May 2010 - 02:34 PM.

[iammykyl]

Hi Guys.

Thank"s for the info.
Not able to try anything for a couple of weeks as I am flying to the UK in about 2 hours.

Cheers.

[TheWhiteRose000]

Well good luck and have fun.
Let us know when you get back.

[iammykyl]

Hi.
Back form the UK, got FROSTBITE.

Tested the PSU, which appears to be faulty, so will return to the shop for a test and possible replacement.

Will get back soon.

Edited by iammykyl, 22 May 2010 - 05:56 PM.

[deggitt]

So you caught our summer!!!

[iammykyl]

At the shop the PSU tested OK, correct voltage on all rails.

I must have got the wrong pins when I tested it.

Q. If I have a corrupt CMOS, dead battery, or any other faulty component attached to the mobo, should I at least see the PSU or case fans spin?

Q. Any other tests I can try before assuming the mobo is faulty?

Thanks.

[phillpower2]

1:Yes
2:Depends,see below
Sounds like you might have a problem with your on/off switch
at the front of your case, to check this you need to short the
2 pins on the MB header (see page 27 of your MB manual to see
which pins).
Make sure the power connectors are firmly in place on the MB.
If you require further assistance with this let us know & just
in case here is a link to your MB manual. http://download.giga....5-ud3l®_e.pdf
Good luck & let us know how it goes

[iammykyl]

Hi.

Connected the 24 pin ATX.
4 pin 12V ATX aux.
Video card.

Shorted out the correct pins on the mobo front header connections.

No activity at all.

Tried without the video card connected.

Still no response.

Any other suggestion please.

Thanks

Edited by iammykyl, 26 May 2010 - 08:38 PM.

[phillpower2]

Sorry about the delay geting back work gets in the way sometimes.
Last throw of the dice unless I can think of any other options, have
you tried clearing the CMOS by shorting the jumper pins?
Try removing the ram sticks & trying them one at a time, remove the
cpu if that looks ok clean off the thermal paste & re-apply a fresh
amount, if none of the above works I would suggest doing a barebones
set-up outside of the case, this will also enable you to have a closer
inspection of the board.
Good luck & keep us posted

NB; Im working on a similar problem at the moment & both the psu & cpu
fans kick in without the on/off switch even being connected

[iammykyl]

Done all the tests, still a dead board so will take back to supplyer.

Will let you know the outcome.

Many thanks.