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  1. goerz

    Blank screen on recapped Macintosh Plus

    I recently bought a non-working Macintosh Plus and I recapped the analog board (240V version). Initially it was a success: clear and steady image, bootup chime, stable 5V output. Then after a few minutes the screen went blank and the board started making a"flup flup flup" sound. I switched it...
  2. goerz

    Recapped Macintosh Classic with checkered screen

    Hello, I recapped a Classic with capacitor damage on the analog board a few weeks ago (logic and analog board). Everything worked fine for a while, but today this pattern appeared on my monitor. I managed to narrow down the problem to the analog board (I swapped it with another one and the Mac...
  3. goerz

    Recapped Macintosh Classic's screen wobbles when cold

    I have a Macintosh Classic that a few months after recapping (and replacing diodes DP3 DP4, the optocoupler, and the TDA4605 chip) started exhibiting a wobbling in the lower bottom of the screen. The wobbling disappears gradually (line by line, from top to bottom) as the Mac warms up, taking...
  4. goerz

    Help identifying Macintosh Classic analog board resistor

    I have a Macintosh Classic analog board with (among other issues) a damaged RF2 resistor (see picture). I have recapped several boards already but I am not familiar with resistors. Can someone help me identify the right replacement? It seems to me it is a 2K Ohms 5% resistor. Is it a metal film...
  5. goerz

    Mac Plus screen unstable when cold

    I got a broken Mac Plus I repaired. Just connecting the power chord (without even turning it on) used to make the main electricity switch trip. I recapped the analog board, replaced the optocoupler, recapped the logic board, and added a diode in the empty location on the logic board to provide...
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