muzak@vax1.acs.udel.EDU (Stephen F Felicetti) (12/31/88)
I recently bought a 2nd internal drive (the A2010) for my 2000. The
installation required connecting a jumper on the motherboard which tells
the computer a 2nd drive is connected. The jumper, however, was hidden
underneath the ribbon cable which connects the drives to the motherboard,
so I decided I should remove the ribbon cable from the board to facilitate
the connection of the jumper. Well, the ribbon cable connector proved
somewhat difficult to remove (I WAS careful to pull it STRAIGHT off), and
when it finally popped off, it took one of the pins off the motherboard
with it! I looked in HORROR at the broken connector on the board and told
myself I should NEVER have tried to remove the cable in the first place.
Well, I tried pushing the broken pin back into the vacant hole in the
plastic connector -- but it apparently wasn't making contact with anything.
I thought of removing the motherboard to solder the pin back into place, or
maybe just to solder a wire in its place, but I just wasn't prepared to
remove the entire board, and there is no way to get to the connection from
above the board -- its hidden beneath the plastic connector which surrounds
all the pins.
I finally looked at the schematics for the drive connector, but I couldn't
tell which pin on the schematic matched which pin on the board (they're
numbered in the schematic but not on the connector)!
If I could just find out the function of this particular pin, where it
goes and what it connects to, I could just hard-wire the respective wire
from the ribbon cable to its proper place, but my attempts to find out
where this pin goes have been futile! Can ANYONE out there help me?
The connector I'm referring to is just to the left of the power supply on
the 2000 (I have a B2000, revision 4.3 -- if that makes any difference).
It's labeled "CN303" on the board just below the connector.
The particular pin that broke off is the SECOND from the REAR of the computer,
in the LEFT column of pins (I think there are 24 pins in all).
Here's a diagram:
[REAR of computer]
+-----+
| . . |
| |
Broken Pin ----> | x . |
| |
| . . |
| |
| . . |
| |
| . . |
| |
_________
//_________ [connector actually longer]
CN303
[FRONT of computer]
I'd GREATLY appreciate if anyone knows the origins of this pin, knows
ANYTHING at all about this connector that might help, or has any better
ideas as to how to overcomethis problem and get my drive working (apart
from taking the whole machine away to be repaired and paying mucho dinero
to have someone rip out the motherboard and replace the whole connector)!
Thanks in advance.
P.S. - the first disk drive still works fine in spite of the missing pin --
apparently the pin has something to do with the second drive only(?)
-- Steve :-( Felicetti