Strange x99 taichi behavior (4f then off)

Joined
Mar 19, 2001
Messages
3,228
I have an Asrock x99 Taichi with the POST code LED. The board begins POSTing running through different codes. When it hits 4f, it shuts off. I've reseated the CPU and tried different RAM, video card, and PSU to no avail. If I take the RAM out or put RAM in the wrong slots, I can get the board to hang at different places in the POST routine without shutting off. It kind of feels like the BIOS is corrupted, but the backup BIOS does the same behavior (although I guess the previous owner could have corrupted both BIOSes). Has anyone seen anything like this before? Does anyone know what 4f means (Asrock has no useful info)?
 
Joined
Apr 16, 2018
Messages
612
Do you have a x99 mb to test the cpu in? Or someone that will let you use theirs? Orrrr can you borrow a cpu to test in yours?
 

pututu

[H]ard DCOTM x2
Joined
Dec 27, 2015
Messages
1,721
I cannot recall 100% for sure but I've experienced something similar like this on my x99m killer board a few years ago. Somehow (which I don't quite understand) when I disconnected all the front/system panel header pins and just leave the power pin on, I'm able to boot up.
 

RazorWind

2[H]4U
Joined
Feb 11, 2001
Messages
3,420
If the board is new to you, but used, and you didn't get the CPU with it, you might check to make sure there aren't any bent pins in the socket. That can cause all sorts of problems, depending on which ones are bent.

You've tried all the really obvious stuff like clearing the CMOS, right? What about testing with other memory, in case it just doesn't like one of the sticks you're using?
 
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