GregorHouse
Well-known member
I'd need some help here with a Macintosh Color (ColoUr) Classic I bought a couple weeks ago. It was listed as not working, but when I got here a quick inspection at the logic board revealed a bad placed ROM chip, which had two pins out of the socket. Once placed properly it booted up, although without sound and a partially working screen, with artifacts and lines. I dishwashed both the analog and the logic board and that brung the sound back, but the screen was still affected. So I did a full recap of both boards and now it won't turn on. I did the analog first and, stupid me, I didn't test before recapping the logic board.
Currently, with logic board removed, the CRT makes noise and the hard drive spins. I get 11.85V and 5.00V on the logic board connector. But when I put the logic board in place it just does nothing. The 5V line drops at 0.18V. I tried isolating the pins connecting the logic board to the analog board, except for the power supply. Then I get 5.00V on the ADB port, but obviously it won't turn on.
I replaced every aluminium capacitor. In some cases I could find the exact same one and I used a higher voltage one, but same capacitance. As far as I know this shouldn't make any difference. I'm running out of ideas here, I can't even tell for sure which board is failing, any tips will be appreciated.
Thanks in advance!
Currently, with logic board removed, the CRT makes noise and the hard drive spins. I get 11.85V and 5.00V on the logic board connector. But when I put the logic board in place it just does nothing. The 5V line drops at 0.18V. I tried isolating the pins connecting the logic board to the analog board, except for the power supply. Then I get 5.00V on the ADB port, but obviously it won't turn on.
I replaced every aluminium capacitor. In some cases I could find the exact same one and I used a higher voltage one, but same capacitance. As far as I know this shouldn't make any difference. I'm running out of ideas here, I can't even tell for sure which board is failing, any tips will be appreciated.
Thanks in advance!