Biostar Z77MXE Debug Error 20 and 55

Rotfl cyclone

Honorable
Jan 27, 2013
15
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10,510
Hello.

I'll try to make this post as short as possible but I know it will probably run on a bit. So I recently purchased a Bio-Star TZ77MXE to replace an old ASRock board I was using for about a year that was rendered useless during a recent lightning storm. After the board fried, I took out each component one at a time and tested it in another 1155 Ivy Bridge build I had running. RAM, CPU, GPU, and HDD all worked and were recognized, so I just ordered the Biostar board and an SSD for upgrade purposes and figured I'd be set from there. I was wrong.

After initial installation of the board, I booted the computer up and the PSU fried. I mean noise, smoke (lots) and much beeping from the motherboard. I shut the machine off as soon as I knew what was happening. Mind you this PSU was also new. So I figured maybe it was just the PSU that was bad, I swapped in my old PSU that still worked from around the house, and the computer booted, no smoke or noise. However, when it did boot I got the number "20" on the boards debug code, followed by a code "55" and then lots of angry beeping that doesnt stop until the computer is shut off.

I saw in the manual there is a listed error code 20, but nothing for 55. After a google search for both of these error codes and a possible workaround, I found virtually nothing.

I've tried everything I can think of. Removing everything except for one stick of RAM and the CPU, switching the RAM into different slots, removing the battery and jumping the CMOS, reseating the CPU, ect. I've even swapped the parts from the Bio-Star build back into another computer and individually they work fine. The interesting thing is I did get the computer to succesfully POST and go to BIOS a few times by moving a single stick of RAM to slot 2 with just the CPU and SSD plugged in. Then I added the GPU, again it booted fine. Then I moved the RAM to slot 1, still it booted up perfectly. However once I swapped in the second stick of RAM to the first slot, to see if it would work with that stick inserted by itself, I began getting the codes 20 & 55 again. And since then no matter what I do the board wont proceed to BIOS. I even went through the exact steps I did to get the board working the first time, with no luck.

I'm at a loss here, I really don't know what else I can do. Of course I would rather not have to RMA the thing and fight with Bio-Star to get my money back, but I'm starting to feel thats the only option. If anyone has any tips or suggestions it would be greatly appreciated, thank you!

System specs:
Bio-Star TZ77MXE
i5 3550
Patriot G2 Series 1600 DDR3 (2x4gb)
MSI N210-MD1G/D3 GeForce 210
Seagate 2TB 7200rpm
Kingston SSDnow 200 (120GB)
ThermalTake 450watt
Samsung DVD/CD-R drive
 


Yes, that is the correct motherboard. So I did try swapping in new G-Skill 1600 DDR3 RAM and I still get the same error messages. And according to the manual the error means "Relocate System Management Interrupt vector for all CPU in the system." No clue what that means.

I saw a couple people say it pertains to the boot drive, and a couple other things I found hinted at the memory channels/CPU seating. I can't seem to find a straight answer myself, and Bio-Star is closed for tech help on weekends. Just really frustrated with this board and my first experience with Bio-Star.
 
Thank you, #55 = no memory installed.
#20 no body knows anything to my satisfaction, google sucks a lot lately.
Give them a call the cpu & the memory are not "talking".
Sorry I am not the final word on anything, but let us know how you make out.
 
So I found a solution to this problem, that worked for myself anyway. After trying everything I could think of, I decided to take the motherboard outside of the case and try booting up. Much to my surprise, the board booted first attempt, no problems. It seems that the board was shorting out on a motherboard screw. After trail and error, I was able to determine the individual screw and remove it, now I'm booting up 100% of the time trouble free. Hopefully this can help someone in the future (maybe) lol.