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After installing a new Crosshair V Formula-Z motherboard the first startup showed that had BIOS 0508. The ASUS website said that my CPU (AMD FX6350) was supported in BIOS 0803 or later. Using a USB Stick I upgraded to 1503. After that it wouldn't POST. I then downgraded the BIOS to 0704.

Now the board has the VGA LED lit and a Q-Code of C6. What does this code mean? The q-code list published in the manual does not have any codes starting with C. Is there a link to the complete q-code list?

More importantly, how do I get the motherboard to work, at this point I can't get to BIOS settings or anything.|

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I would contact ASUS technical support on this subject. If the Q-Code isn't documented in what you have, then unless you find somebody who actually knows, we don't have access to the information. Furthermore if its new then its under warranty. – Ramhound Sep 17 '13 at 17:14
I called ASUS tech support (twice) and they could not give me the definition of the Q-Code. I wound up returning the board and going with a different manufacturer. – MERM Oct 8 '13 at 18:00
I would post that as an answer. Simply state that you contacted ASUS and determined the Q-Code is undocumented or perhaps better indeterminate. – Ramhound Oct 8 '13 at 18:10

According to ASUS technical support, the Q-Code C6 (and C5) are undocumented.
They also stated that there is not a definitive list of Q-Codes available on the web.

At their direction I returned the motherboard and got a replacement.

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