1. Computer problem? Tech Support Guy is completely free -- paid for by advertisers and donations. Click here to join today! If you're new to Tech Support Guy, we highly recommend that you visit our Guide for New Members.

Solved: Odd BIOS (POST) Error Code

Discussion in 'Hardware' started by snorkytheweasel, Aug 7, 2006.

Thread Status:
Not open for further replies.
Advertisement
  1. snorkytheweasel

    snorkytheweasel Thread Starter

    Joined:
    May 3, 2006
    Messages:
    215
    Motherboard:
    PCCHIPS Model M810DLU (ver 5.2a)
    BIOS:
    AMI 62-1111-001131-00101111-040201-SiS740- M810D

    I pulled this MB off my shelf of "projects". When I tried to make this work in the past, it always failed to boot. However, I discovered yesterday that 2 of my 3 Socket 462 "project" CPUs didn't work at all. #3 project chip - Athlon 2100+ does work.

    So I put that project MB and project chip together, and the combo worked. I was able to boot from a live linux CD and from a Bart PE CD. That's the good news.

    The bad news is that this combo - loaded with memory, video, drives, and any of 3 brand new 450W power supplies - occasionally fails to boot.
    When it dies,
    • it's on one of the first 10 instructions
    • fails on POST Code 'dF'
    • resets the DRAM and CPU rates from 133 to 100 - changing my CPU from a 2100+ to a 1500+ -- PS: I know that an Athlon XP 2100+ actually operates at 1733Mhz

    The Power Supply stays on and other MB accessories (CPU fan, drives as examples) continue to function. The video does not light up because it's too soon in the POST to display.

    Normally that would be no big deal: look up the POST code and see where it failed. The problem is that I can't find any reference to a code 'dF' in any AMI or Award documentation or in the documentation available from PCCHIPS.

    I've Googled terms like
    + pcchips + motherboard + m810d + "boot" + df
    I've always gotten lots of hits, but nothing has panned out from those searches.

    It's most likely to fail as described above when the system has been off for a while. If the system is "warm", as in a reboot, it is less likely to fail.

    Does anyone have a suggestion on how to figure out what's happening?
     
  2. qldit

    qldit

    Joined:
    Mar 18, 2005
    Messages:
    3,390
    Good Evening snorkytheweasel, I was just reading your post and the M810 looked familiar, quite coincidentally I have one in front of me right now. It is a M810LM slightly different but close.

    It doesn't even post!

    It did have an odd fail problem before it died. It originally had an Athlon in it.

    I tried a Duron 1900 in it and it failed to work also.

    I don't think this board is worth playing with further.

    That hanging boot symptom is typical of a low 5 volt rail from the PSU.
    One last effort may be tried by using a digital meter set to read a DC voltage higher than 10 volts and measuring one of the PSU drive power plugs between the red and black wires in a powered mode. That 5v is critical.

    I have no idea what a df code is.

    qldit.
     
  3. snorkytheweasel

    snorkytheweasel Thread Starter

    Joined:
    May 3, 2006
    Messages:
    215
    I think it's time to terminate the project. When it's almost impossible to pay more than $40. US for a socket A M/B... I don't feel like wasting any more time on it.

    The clincher was when I figured out that the wrong manual accompanied the board. When downloading the PDF version of the (hopefully) correct manual, from the manufacturer's site - the manual came through corrupted! This M/B has way too many negatives. It's bad to the bone. Landfill, meet my ex-motherboard.

    BTW, I don't think that mine has a 5V problem. The diagnostics I've run show a steady 5V.
     
  4. qldit

    qldit

    Joined:
    Mar 18, 2005
    Messages:
    3,390
    Yes good tack, proceeding is a bit like "flogging a dead horse" into a money pit!! (LOL!!)
    cheers, qldit.
     
As Seen On
As Seen On...

Welcome to Tech Support Guy!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.

Join over 733,556 other people just like you!

Loading...
Thread Status:
Not open for further replies.

Short URL to this thread: https://techguy.org/490092

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice