Re: Apple II Plus EOL

["Bill Garber" <willy46pa@comcast.net>]

"Iosaef the Irascable!" <rummikub32@yahoo.com> wrote in message
2caa3404.0312011654.4db87db5@posting.google.com">news:2caa3404.0312011654.4db87db5@posting.google.com...
: Hey all!
:
: I finally got my grubby paws on an Apple II Plus.  Nice unit,
48k +
: 16k language card, Epson APL board, Disk II controller, etc.
Well,
: the string of problems with this unit (PSU lost its magic
smoke,
: apparently bad RAM chip somewhere, dead Reset and Shift keys)
has led
: me to post a question:
:
: On Apple IIs as old as the Plus and original IIs are, what have
people
: here found to be going out most often?  I've read around about
the PSU
: failures, and 25+ year-old capacitors blowing out isn't all
that
: surprising.  But what about other failures or wear points in
their
: machines?

Well, if you haven't done so as yet, the first thing
you need to do before running any vintage equipment
is to remove, one at a time, every socketed IC, check
to see that the pins are straight and clean, then reseat.
I found on my II+, one 74LS138 to the left of slot 0, had
a pin that was not in the socket, causing me to have no
DEVSEL signal to slot 5. Once this pin was inserted into
the socket, slot 5 worked as it should. Also a bad memory
chip will cause the entire 16K bank to malfunction, depending
on where in the chain the bad one is. Try that and if it
doesn't help we'll look into it further, but I suspect that
will solve the problem.

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy4SPAM6pa@comXcast.net
Remove - SPAM and X to contact me


: Just on an up note, I've got the Plus on a IIe's power supply
for life
: support, and the RAM failure seems to manifest itself in the
HGR2
: screen, in a cheesy BASIC screensaverish thing I wrote for my
IIe.
: Vertical lines through the screen, but no other artifacts in
other
: video modes.
:
: Take Care!
: Josef


---
This email ain't infected, dude!

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.544 / Virus Database: 338 - Release Date: 11/26/03