IIci will not power on

[bigD]

Hello! A few years back I purchased a recapped IIci here on 68kmla, and it had been working fine until about a year ago, when it stopped powering on. I did the usual removal of all accessories, memory, etc...but there's no response at all when attempting to power it on either from the keyboard or the button on the back. I have a working Quadra 700 so I know the keyboard, cables, and power supply is fine.

I'm not very electronically savvy, but I do own a multimeter and I figure this might be a good way to start learning. Also happy to use this as an excuse to buy more stuff.

Any ideas on where to begin, or maybe point me in the direction of an online resource or thread?

 

[finkmac]

sounds like the person who recapped it didn't properly clean the leaked electrolyte

multimeter is halfway there... i hope you have a soldering iron too?

start by pulling the board out and looking at all the capacitor areas. normally, I'd link recapamac.com.au... but it seems to be down right now

here's the wayback archive. it may not be complete.

see the area on the upper left of the board images? that's where your problem is likely to be.

start off by inspect/cleaning the area around the capacitors. i use 99% isopropyl alcohol and toothbrushes/cotton swabs for that

if that doesn't bring it back, you'll have to start beeping out the various connections using the continuity test mode on your multimeter

see here:

Spoiler: startup circuit

you need to make sure everything here is connected to where it needs to go.


as for the person who sold you this... and it's really not hard to find out who did by searching here... did you really sell it without properly cleaning the lytic?
naughty naughty!

 

[bigD]

Sounds great. Thanks! I'll start working on it this weekend.

Don't want to call out the seller because this thing worked fine for years, which as far as I'm concerned is a win for hardware that's pushing 40 years old!