Day 2, a little more testing...
The only way I can get the yellow LED (cache activity) to light
up is by pressing on the oscillator. Even then it often just flickers
on for a second, but I can see the action of_pressing_ on the
oscillator socket causes the LED to blink on and off...obviously
there's a loose connection here.
Further proof, if I firmly press down and continuously keep my
finger squeezing the oscillator it stays lit up and even lights back
on after doing a Control-Reset on the keyboard. I still cannot get
the IIgs to show *any* signs of life--black screen and no sound.
You would think holding down the oscillator would get it to boot
up, unless maybe more than one of the 4 pins have a break, or
now the 40-pin CPU socket is hosed from all the resocketing
I tried last night.
Is it normal for the yellow cache LED to not light up on power
up, or touching the socket/oscillator to make it intermittently turn
on and off? I'm 99% the answer is "no" but I don't have another
ZipGS in front of me to compare with.
What are the chances resoldering the oscillator socket will
fix this? Is there a possibility something else is damaged based
on the symptoms I've described?
Mitchell Spector