Macintosh Classic doesn't work after recap!

[iZier Museum]

Hi everybody!
Unfortunately I'm having some troubles with Macintosh Classic. I did a Recapp on the analog board; but unfortunately my Mac doesn't work.
There's only flashing on the screen without noise. Take a look on this videos!

I hope that we can find a solution together!
Tks a lot for the support;

Ederson
iZier Museum

 

[3lectr1cPPC]

Start by checking voltages from the analog board, you may need to adjust the voltage pots to get it up/down to spec. You can check on the hard drive power connector. Have you recapped the logic board?

 

[cheesestraws]

Did it work before the recap?

 

[iZier Museum]

Start by checking voltages from the analog board, you may need to adjust the voltage pots to get it up/down to spec. You can check on the hard drive power connector. Have you recapped the logic board?

Hi; I recapped only the analog board. I'm new on this universe.; can you inform how to adjust the voltage pots? tks a lot for your help.

 

[iZier Museum]

Did it work before the recap?

No. Unfortunately was necessary to change the capacitors after they leaked!

 

[joshc]

You will need to recap the logic board as well.

In your second video, it looks like the picture is stable and the crap on the screen is probably caused by a logic board fault.

But yeah, before anything else, recap the logic board and check the voltages from the analog board - either from the molex connector for the hard drive or from the floppy port. That's with the machine switched on.

 

[iZier Museum]

You will need to recap the logic board as well.

In your second video, it looks like the picture is stable and the crap on the screen is probably caused by a logic board fault.

But yeah, before anything else, recap the logic board and check the voltages from the analog board - either from the molex connector for the hard drive or from the floppy port. That's with the machine switched on.

View attachment 43447

Perfect. Tks a lot for your support. I'll use your informations and this "manual" that I found on the internet today. RGS!!!

 

[joshc]

@iZier Museum Good luck, let us know if you get stuck/need more help!