I think Tony will agree with me, if not I'll hear about it. If you want to
save the board and don't care about the ( dead ) DIP ICs you are removing,
cut all the legs off of the DIPs and remove them one-by-one with minimal
heat and long-nosed pliers. Also don't use solder wick but rather poke a
round wooden toothpick in the hole to clean it out. This will cause the
least amount of damage to the board and I haven't lost a via yet with this
method. Good luck.
Best regards, Steven
----- Original Message -----
From: "Tony Duell" <ard at p850ug1.demon.co.uk>
To: <cctalk at classiccmp.org>
Sent: Saturday, April 04, 2009 1:04 PM
Subject: Re: HP 9825 16K 09825-66523 memoryboard failure
I've had vias fail on old HP boards when soldering/desoldering
components. My next task would be to check that all pins on all RAMs go
to the rignt places and that none are left floating.
And then do make sure that all address, data, etc pins are being driving
nad that none are floating around.
-tony