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Discussion Starter #1
I have a similar problem. When the PSU is switched on, the case fans and CPU fan spin for about 2 seconds, all four phase LEDs come on, and then everything turns off. The case power and reset buttons do nothing.

The speaker emits either 2 short beeps, or 1 long and 1 short, but they sound the same to me. The MB manual indicates 2 short is CMOS setting error, but the jumper won't come off (or there isn't one on, but it looks like there is). It says 1 long, 1 short is a memory or mb error, but it won't POST with just one stick in either.

MB: Gigabyte H55-USB3
CPU: Intel i3 540 - 3.06
RAM: G.Skill Ripjaws 2X2GB DDR3 1333
PSU: Antec TruePower 650W

Anyone have ideas? Thanks.
 

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Do you have a single ram stick installed in the 2nd ram slot when counting away from the CPU? ( dual sticks go into the 2nd and 4th slot on these boards).

To clear the CMOS the header probably just has 2 pins sticking up from the board, disconnect the power cord from the wall and use a small screwdriver to connect the pins to clear hold the screwdriver across the pins for at least 10 seconds.
 

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Discussion Starter #17
Just got the replacement MB back from NewEgg. Set up the bench test, everything worked great; got the bios, did some setup. Then I installed everything in the case, and what the hell? It started doing the same thing the first MB did. So I took it apart again and set it up on the bench and it never got to bios again.

Is it possible that the case is shorting the MB? The case is a Thermaltake V4, btw.
 

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Are you using one standoff (no more- no less) for each Mobo mounting hole?
 

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Discussion Starter #19
The case has a mobo tray with like risers instead of standoffs. The center ATX hole goes onto a little post. So I slide the mobo onto the post and then use 8 screws (instead of 9) to screw it into the risers.

The top right corner of this pic shows one of the risers.
Welcome to Thermaltake
 
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