Re: IIgs won't start up -- ZipGS dead?

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

"Mitchell Spector" <mitch2gs@hotmail.com> wrote in message
egnid29jh8oan0cjsjn7ev8r9j4itm44n1@4ax.com">news:egnid29jh8oan0cjsjn7ev8r9j4itm44n1@4ax.com...
: "Bill Garber" <willy46pa@comcast.net> wrote:
:
: >
: >"BluPhoenyx" <bluphoenyx@earthlink.net> wrote in message
: >news:iMcBg.4536$xp2.2371@newsread1.news.pas.earthlink.net...
: >: Mitchell Spector wrote:
: >: >     Another update: I decided to have a closer inspection at the
solder
: >: > joints on the backside of my ZipGS, so I used my flatbed scanner as
: >: > a sort of digital magnify glass.
: >: >
: >: >     I spotted what appears to be a bad solder joint on one of the
lower
: >: > oscillator socket pins (by no coincidence, this is also the area
where
: >: > when touched, will cause the cache LED to flicker on and off). It
looks
: >: > like all the solder around the pin dried out and is missing.
: >: >
: >: > Here's a shot, showing the backside of the oscillator socket:
: >: > http://www.digitalsparkles.com/student_a/ZipGS1.jpg
: >: >
: >: > Here's an close up of that suspect pin:
: >: > http://www.digitalsparkles.com/student_a/ZipGS2.jpg
: >: >
: >: >     My only concern is why pressing on it (to temporarily rebridge
the
: >: > connection) still leaves the GS in a dead state. I'll try it in
another
: >: > motherboard tomorrow but I think getting someone to resolder this
: >: > pin will be the first step.
: >:
: >: Perhaps the oscillator is dead. It's also possible that the connection
: >: isn't that good during this "bridging". I would suggest that someone
: >: carefully examine the other connections as well.
: >
: >Looks to me like the other connections aren't so good either.
: >Seems from just these connections that the whole card may have
: >been spiked heavily. Possibly a static charge from the PSU while
: >powering down, or up even.
:
:     I'm leaning more towards Mike's theory, especially considering
: what put it in a non-functional state was my pressing *very* firmly
: on the oscillator just seconds before it went dead.
:
:     Over the weekend I tried the card in a different motherboard
: with a different CPU ribbon cable. No change, same symptoms.
: Hopefully resoldering that _single_ pin will fix it, though I'm going
: to have to find someone to do it for me.
:
: Mitchell Spector

Ok, if you insist, I'll do it. I've repaired 2 of these already,
so what the heck, I'll do another one. Email me and I'll give you
the address, unless you remember it.  :o)

Bill Garber