Date: Wed, 16 Mar 2005 19:29:48 -0800 (PST)
From: Matt Hanson <[EMAIL PROTECTED]>
Subject: RE: [LIB] Dead L110
Okay... I’ve done the voltage tests on the parallel port connector pins on
the SPR (Standard Port Replicator) with the 110 system connected, booted,
and the space bar pressed.
Here’s the DB-25 Connector Pin #s and voltages on the SPR with 110
connected (see legend below):
13 12 11 10 9 8 7 6 5 4 3 2 1
B B B B C C C C C B C B A
14 15 16 17 18 19 20 21 22 23 24 25
0 0 0 0 0 0 0 0 B D B A
I'm pretty sure that the layout of the numbered pins (sockets) above should
correspond to the pin numbering for the DB-25 (female, right?) connector on
the SPR. The numbering would be a mirror image for the pins on a printer
cable connector, with pins 1-13 on the top row reading from 1 on the left,
to 13 on the right instead of the opposite order as I’ve laid it out above
for the connector on the SPR.
Legend:
A = -4.44vdc
B = -4.28vdc
C = -0.20vdc
D = -0.04vdc
All others are grounded and read: 0vdc
The pins involved in the Printer Port LED test are 2-9. So if the voltage
B corresponds to a LED being 'on', and C to 'off', pins 2-9 would read in
binary from left to right as instructed in the manual as:
0 0 0 0 0 1 0 1
Which would calculate to 5 in decimal and also 05h hexadecimal. "Table 2-3
Printer port LED boot mode status" in the manual says this means a problem
with "CMOS check and initialization Enabling cache ROM to RAM copy"
The resolution for the issue for this, and the following error codes, is to
replace the motherboard as explained in "Procedure 5" under the same
section of the manual:
B0h, B2h, B3h, 00h, 01h, 05h, 06h, 03h, 04h, 02h, 71h, 07h, 73h, 74h, 72h,
76h, 79h, 77h, 78h, 81h, 82h, 7Bh, 7Ch, 7Ah, 08h, 09h, 0Dh, 19h, 1Fh, 20h,
21h, 25h, 30h, 40h, 41h, 42h, 70h, 80h, A0h, C0h, A6h, FEh
Okay... that behind me, I'm pretty sure there's nothing I can do at this
point to resurrect the MB, even though I'm not totally convinced that this
was a valid test. I say that because pressing the space bar after powering
up the system made no difference in the voltages measured. So I don't know
for sure that the system was responding to being powered up without the
Printer Port LED test module connected in the same manner as it would have
with the module connected.
Not having a system with the same booting problem, I have no way to A/B the
test. So if anyone else with a similar problem with their system booting
performs this test, I’d like to hear back from them on what their test
results are.
I >did< try the test both with AC connected and battery inserted, and then
again with only the battery powering the system (didn't try AC only). But
I found no difference in voltages each time, and then with or without
pressing the space bar for each test. But all the voltages on all of the
pins remained the same no matter how I tested the system.
And oh... After having let the 110 MB sit unconnected to any power for 4-5
days now, I wasn't able to get the system to either boot, to get into BIOS
via ESC, or to get a BIOS update to load via the F12 method (tho' I can
swap MBs in under 10 minutes now :-D). Maybe when the screen for the BIOS
settings went from white to blue to red lettering, and then to a blank
screen of white and black stripes (gray) last week, the MB may have given
up its last vestiges of life for good.
Matt .... sigh ....
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