New BioStar motherboard giving an unknown post code

brianwolfe86

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Jul 23, 2015
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Just picked up a BioStar TZ77MXE motherboard and am having trouble getting it to POST successfully.

I'm getting code 20 on initial startup for 3-4 seconds followed by 55 on the LED display which persists until I shut it off. There's no reference to this code in the manual and I get no video output.

What I've found online seems to indicate a potential memory issue. I've tried each of my two sticks individually in each of the four slots with the same result. Also get code 55 with no memory in the board at all.

Can anyone confirm that code 55 is indicative of a memory issue? Can supply additional config detail if needed.

Thanks in advance,
Brian