Recent content by rushfan82

I have two boards for it, one is an upgraded 512k board from another computer, the one I fixed is the original one to the machine. 

Picked up a boxed 128k a week or so ago and it came with both its original board and a spare that had been upgraded to 512k. I ordered some new tools and some sockets and 4164 chips, and after a few hours and some minor troubleshooting, it works great! This is my first time replacing something...

Will do. Thank you all.

I am beginning the process of recapping the analog board on my 128k after the RIFA exploded, and was hoping to gain some knowledge because according the list of caps on this Google doc: https://docs.google.com/spreadsheets/d/132RwzC8HM5ask-BdY_31txErOCwJDSkz099GY2XLpE0/edit?usp=drivesdk The...

So it turns out the keyboard issues were software related. In system 3 the keyboard works exactly as it should.

Thanks for the reply, I've ordered new capacitors for the sweep board from Mouser. In regards to the keyboard though, is this an issue with software? Or is this a hardware issue? I have the number pad as well and two cables for each and neither work, in any configuration.

Hello all, I just bought a Macintosh 128k, and am having issue with the keyboard, or any system program that uses the keyboard (notepad, key caps) There is no input at all, and when opening the programs, cause the system to freeze and the screen to display garbage.  The motherboard is a...

I've recapped everything, reseated the rom countless times, no chime.

So I'm narrowing down on bad ram, as I notice that the screen patterns change whether I install my two 1MB sticks or the two 4 MB sticks, versus no additional RAM at all. Is it really worth it to go this far and replace integrated ram, or should I just call it a day and try to sell it? I already...

How would the flyback be an issue if the CRT is working correctly?

I installed the 8MB of RAM I bought for it and now it does this, after displaying vertical lines for a while. Reset sometimes makes it change between vertical lines and this. I've also installed a new PRAM battery.

So I've replaced every capacitor and cleaned everything as best I could, still no luck, same issue. I haven't replaced the diodes but I'm not suspecting them as the voltages are now a perfect 5v and 12v. Could this be bad RAM? I have attached an image with what is displays after recapping.

I have begun the process of recapping everything, and I'd like to replace the two diodes on the analog board. Which ones should I buy? Is there a schematic somewhere of the analog board on this machine? Thanks!

Hello all, I recently acquired a Classic II and am trying to get in running. Currently it displays just garbage on the screen, or vertical lines. I've put the motherboard through the dishwasher and have a new cap set on the way, even so the fluid leaks were very minimal on the board and it...

Hello again, I was cleaning out my G3 because the inside metal was covered in dust, and I am having problems with the hinge that is underneath the logic board (A big plastic sorta plate). When I went to close the case with it attached, I had to use all my force to get it back open, which caused...