If you didn't bridge anything then you might have a small fragment of debris floating around... Take that board out and shake it or blow some air on it... Also, Have you checked wi…

Well since pretty much everything on the entire board runs on 5 V . Usually shorts are caused by solder bridges. But in the case of these LC boards. Have a closer look at all t…

I am thinking that maybe the board is bad, the problem come and goes for whatever reason, i have removed most of my work to double check, and nothing obvious. The problem disappea…

As a general rule of thumb, any 601-based PowerMac I use OS8, 8.5/8.6 on 603-based machines and 9.1 on 604-machines... that being said I am running 9.2 on my 9600 with OS9helper. G…

I havé continuity between 5 volt and ground at the PSU connector and at C19 pads.

nothing too significant. 

I thought for the Classic II's there was quite a bit of difference between the two revisions?

Depending on the stiction, I find it can take more than a light rap on the side of the machine. In my Classic II's case, I had to brace it with one hand and hit it as hard as I cou…

Yeah, Here's a board with stock caps that has correct polarity so it's not backwards on all of them... Just be mindful of it... Your silk screening is correct BTW... Stupid questi…

check the input voltage from the AC adapter to make sure it isnt falling. If it seems stable, assuming your DMM will see the transients. Dont use a cheap 10 dollar meter they wont …

It's coming Monday (18 May 2015) so no verdict on it yet. I'll tell you sometime next week. The power adapter (which I may not need, since I found the Clamshell adapter) arrived t…

What is the verdict with the 1400/166? Does it work? The topic being hot is because it reached 20 replies in a short time.

It's trying to boot. It sounds like it is not getting enough voltage to the board. Q: Is the battery in when you turn it on? Try turning it on without the battery. Also check tha…

Unless the forum allows HTML; no. The LC and the Mac II are the only '020 68K machines. The LC II & LC III, along with the Mac IIx, IIcx, IIci, IIci, IIfx and others are '…

Yep the c22 there, especially if you're installing a Tantalum , The silkscreen is incorrect, so plus is negative the negative is plus, for c22 only. Of course installing bipola…

Apparently C19 should be the cap for +5 volt (C22 for -5 volt) i have removed the capacitor but without schematics i won't be able to trace anything. Here are pictures:

Start out by figuring out which cap is for 5 volt, can you post a high-res image of your logic board? Also, I remember reading somewhere that Uniserver found a cap that was labeled…

This topic is marked as "HOT"! I think it's the first topic I started that is "HOT"! Edit: Actually all the topics I've started (save my latest one) are "HOT".

I don't know, Uniserver might be able to help.

Also, does anybody know how to do a table?

The acetone+alcool combination seems to have produced some effect, but I'm not sure if this is to be interpreted as a positive progress or a bad sign. Apparently, the system now *…

well there is only 8 caps to change on there so it wouldn't be a ton. couple things to try first though. 1. double check your monitor is working, those are dying from bad caps no…

Finally had some time to look at this boy.  I tried Elfen's suggestion and scrubbed the board with alcool and a toothbrush, but it doesn't seem to have made any difference. I also …

Hmm. How much would you charge for a recap? Are you reasonably sure that the caps are the problem or could I have put it back together wrong? heheh

I couldn't get Netscape to install on 7.5.3 and I think my IE installer was corrupted, so I'll need to look for another copy / older version.  I do have an IRC client and an SSH cl…