SUMMARY: SS10 Troubles

Hello,
  Many thanks to the many people who responded.  Buddy Lumpkin
<Buddy.Lumpkin@nordstrom.com>, who is
very knowledgeable about these machines, pointed me in the right direction
by noting that U0201 is a chip number on the motherboard.  Buddy suggested
from the error message that there was an open connection rather than a
short.  I thoroughly cleaned the memory slots and was quite happy to find
that this worked.

Thanks again to everyone who helped.  This has to be one of the best
mailing lists I've run across.  Hopefully I will be able to contribute
more in the future.  Original message and update copied again below.

-- 
Eric P. Anderson / andersep@slu.edu / IRC: Xanatos@irc.pnwx.com
Getting kicked out of the American Bar Association is liked getting kicked out of the Book-of-the-Month Club. -- Melvin Belli on the occcasion of his getting kicked out of the American Bar Association

---------- Forwarded message ----------
Date: Mon, 16 Apr 2001 19:17:41 -0500 (CDT)
From: andersep@SLU.EDU
To: sunmanagers@sunmanagers.org
Subject: UPDATE:  SS10 Troubles

Hello,
  It's been a while since I posted this, but I finally had the time to try
some things.  Basically, the problem is that my SS10 won't boot.  The LED
in front never comes on, but the keyboard beeps, the keyboard lights
flash, and the hard drive runs for several seconds, then it just sits
there.  I have tried replacing the framebuffer, CPU, motherboard, power
supply...finally, I found a male-male gender changer for my null modem
cable and hooked that up.  I held down Stop+D and on one motherboard it
outputs nothing to the serial port, the num lock key does not light
on this board, and the caps lock key doesn't flicker either.  On the
other motherboard, I got the following serial output, along with the num
lock key staying lit on the keyboard:

MMU Context Table Reg Test
MMU Context Register Test
MMU TLB Bit Pattern Tests
D-Cache RAM Write/Read Test
D-Cache PTAG Write/Read Test
D-Cache STAG Write/Read Test
I-Cache RAM Write/Read Test
I-Cache PTAG Write/Read Test
I-Cache STAG Write/Read Test
EMC/SMC Control Regs  Tests
ECC Multiple UE Test
     ERROR : Address = 00000008, exp = 0001d008, obs = ffffffff, xor = fffe2ff7
     U-NUMBER : U0201

Now, I have five 16MB sticks of memory to test.  I tried each of them
one-by-one, and got this message every time.  The Address and the U-NUMBER
always remain the same, and so does the exp.  The obs and xor seem to vary
- though the obs is most often 0xffffffff.

Hopefully someone can help further now that I have this information.  I'm
tired of spending money on this thing and am feeling like giving up.

My original post printed below.  Responses were numerous and varies, from
those reminding me to connect a null modem cable and get the output, to
suggestions that the memory or keyboard were bad.  Thanks for those who
have replied previously.

-- 
Eric P. Anderson / andersep@slu.edu / IRC: Xanatos@irc.pnwx.com

---------- Forwarded message ----------
Date: Sat, 31 Mar 2001 18:44:26 -0600 (CST)
From: andersep@slu.edu
To: sunmanagers@sunmanagers.org
Subject: SS10 Troubles

Hello,
   My SS10 mysteriously stopped working.  It comes on, the keyboard beeps
and the lights flash, and the hard drive comes on and whirs for a few
seconds, and then it just sits there, no video output or anything.  Stop+D
didn't do anything, caps lock never flashed.  So I swapped everything over
to a different SS10 motherboard.  This time, the same thing happened, but
when I hit Stop+D, the caps lock flashed a few times like it was doing the
diagnostics, and the num lock comes on.  The last time this thing booted,
I had some garbled video and so I suspect that the framebuffer may have
failed.  I tried hooking up a serial console but I think I don't have the
cable quite right, as I'm not getting anything with that.  I tried
removing the framebuffer and that doesn't change anything.  I also tried
swapping the CPU, no difference.  At no time does it ever give any video
output.  So my question is:  would a bad or missing framebuffer cause the
problem I am having?

TIA,
Eric
  


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