Search results

So I have come across a problem with my macintosh plus and that over time the screen horizontally starts to shrink. I dont know what could cause this and im not home to do research. It might be the flyback but idk.

Another problem that could cause this is that your 12 volt line is low and that to test this just unplug your floppy drive and see if it boots. If it does there are alot of forums about how to fix the problem online.

I would turn down the voltage cut off and it should fix the problem which I think is a easy fix. Its good that its not your mother board I can assure you its not. I think the other AB just needs a recap and a little ajustment.

Ok so thats fixed but I still am haveing another problem I should have mentioned. The brightness knob does not work what so ever and there is no cracks in the solider, the sound issues, and the focus ajustment barely works either.

Ok ill try it now

I would first replace the 1000uf and 2200uf caps then check to see if your connector needs cleaning. If non of that works I would check the MB to see if your tsm chip has fried I have 2 boards with dead chips. I would also check to see if your flyback is good and if any other caps are cracked ot...

Check the voltage pot i had that issue multiple times I would do a full recap after ajusting it to see if its your problem. You would want to turn it to the positive side a little it looks like your putting a little too much power into the MB

So I purchased a macintosh plus to fix my other macintosh (Which finaly after 4 months I figured out that the 1000 uf capasitors tolerance made them off set and didnt work correctly and that the tsm chips on both of my MBs are dead) so this new mac has started to have issues with the screen and...

Awesome I found that both cr21 and cr20 are shorted. Thanks I'll get back to both of you when I get it working

This sounds about right. But I don't know exactly, I checked all the other solutions and this is the best. I also just tested it and I am getting a resistance. Does that mean its good? I mean absolutely I'll do it any way because its just $5. I just want someone to confirm that CR5 is positively...

Ok I'll look

Right, I'll try my best to get all caps. I really was not measuring resistance meter I was using this capasitence tester. I pulled out the cap and measured it.

I did until I looked under the sticky pad. Well I re-flowed a lot of suspicious solider joints and nothing. So I still have no idea whats happening I also forgot to mention i did test the diodes and transistors by the flyback, they were all good. I also tested the optocoupler, it turned out...

Wait the yolk plug solider is cracked I think that might be a problem let me check real quick

Not C1, I used a cap tester and I got the correct capacity rating.  I mean if I have to I will replace it, but it did read correctly so Idk. 

And replaced the two X2 4700pf and the X 0.1 uf

Yes, I replaced the ones I could and tested the ones I could not. The ones I didn't test completely were the smaller 33 and 22uf 16v caps.

One last thing if I didn't mention. When I was diagnosing it still ticked when the motherboard's plug was disconnected, so its the analog board

 sorry it looks crappy I use a LG phone. I cleaned both boards really good so its only the case and the steel that is corroded

I would buy a floppy emu its awesome I love it and it never fails. it comes with free software too if you buy it as a package.