Thread
IIcx Power Woes
I have 8x1MB Hitachi SIMMs (all matched and filling both banks) and a 820-0198-A7 (MAC II) Video card.
I tried the suggested configuration and still get the power-up with out pushing the power button or the keyboard 'startup' button.
There is still no startup bong.
I tried the suggested configuration and still get the power-up with out pushing the power button or the keyboard 'startup' button.
There is still no startup bong.
About two weeks ago, someone nearby (1-1/2 hours, that's not too far for Vintage Mac parts is it?) had a IIcx and IIci board posted on Craig's list for $15, so I thought that might be better than spinning my wheels with this, so I picked them up, cleaned and re-capped the IIci board (I rescued the caps from the IIcx that was in the previous posts), carefully cut out an extra hole in the back of my cx case (for the onboard video - I had mixed feelings about that, but utility won out) and booted (with chime) into 7.5 on the IIci-x. The floppy needs to be refurbished, but otherwise it is in perfect shape. :beige:
The extra IIcx board that I picked up?
I booted it up to make sure that it worked as well and then I un-capped it. (I will re-cap it later, when I have time) ... for now I won't have to worry about the caps leaking.
One thing about that IIcx board, it was VERY easy to remove the caps, very little heat and very light twisting removed them. It was almost like the solder, holding the caps on, had dry-rotted, since they were almost falling off.
The extra IIcx board that I picked up?
I booted it up to make sure that it worked as well and then I un-capped it. (I will re-cap it later, when I have time) ... for now I won't have to worry about the caps leaking.
One thing about that IIcx board, it was VERY easy to remove the caps, very little heat and very light twisting removed them. It was almost like the solder, holding the caps on, had dry-rotted, since they were almost falling off.
I figure I should put this anecdote in here for posterity.
I was stumped that after recapping a IIcx board for someone. It would not power on via ADB. The power switch on-board worked fine and it ran very stably. All of the keys on the keyboard worked and the mouse was fine. The only thing that was not working was the power-on via ADB keyboard.
Pin 2 is the pin for soft power and to send the power button signal, it shorts to the pin 4 ground in the 4-pin ADB mini DIN. All of the ADB pins on the two ADB ports are linked in series then to the rest of the logic board. After close inspection, I saw that the trace linking pin 2 between the ADB connectors was rotten. My guess is that the leaking capacitor electrolyte oozed it's way between the two ports and ate away at the small trace.
I was stumped that after recapping a IIcx board for someone. It would not power on via ADB. The power switch on-board worked fine and it ran very stably. All of the keys on the keyboard worked and the mouse was fine. The only thing that was not working was the power-on via ADB keyboard.
Pin 2 is the pin for soft power and to send the power button signal, it shorts to the pin 4 ground in the 4-pin ADB mini DIN. All of the ADB pins on the two ADB ports are linked in series then to the rest of the logic board. After close inspection, I saw that the trace linking pin 2 between the ADB connectors was rotten. My guess is that the leaking capacitor electrolyte oozed it's way between the two ports and ate away at the small trace.