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When turning on new computer the motherboard speaker beeps 4 times, then restarts the computer, when it beeps 4 times again and outputs nothing to the display.

The motherboard error display also shows Fifty five (55), but I cannot locate any references to the error codes Zotac uses.

Thinking this might be the "system timer error" I replaced the CMOS battery (though motherboard is new) and no joy.

The model in question is Z77ITX-A-E but may be useful to others.

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This turned out to be a very stiff RAM slot, which locked down even though the RAM was not fully seated, removing all the components and replacing them one by one showed my error.

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Heh. Looks like the first beep was a long one. I feel for you on spending effort for a silly error. With my stepfather, we put together and apart my new computer like 5 or 6 times, desperately looking for the issue as to why it didn't turn on. Turns out he had accidentally put the power supply on 240V instead of 120. xD –  Ariane Jan 11 '13 at 18:50
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