Hey guys. I need help with an analog board I am trying to run on a Mac plus. It’d driving me bananas! It makes a ticking sound when the RAM test completes. The sound goes away IF i unplug the ribbon cable from the floppy drive to the logic board OR if I put a disk in the floppy drive! Here’s what i have done to figure out what’s causing the noise.
-I recapped the board. Still ticks.
-I tried with a different analog board that didn’t recreate the sound. To me that eliminates the logic board and the floppy as the culprits.
-I tried with a different floppy drive and not surprisingly still ticks.
-I tried with a floppy cable that has a red stripe instead of yellow. Still ticks.
- I have checked and double checked the polarity.
-I tried to swap out the cable that runs from the analog board to logic board. Same issue.
any idea what this could be?
Michael
-I recapped the board. Still ticks.
-I tried with a different analog board that didn’t recreate the sound. To me that eliminates the logic board and the floppy as the culprits.
-I tried with a different floppy drive and not surprisingly still ticks.
-I tried with a floppy cable that has a red stripe instead of yellow. Still ticks.
- I have checked and double checked the polarity.
-I tried to swap out the cable that runs from the analog board to logic board. Same issue.
any idea what this could be?
Michael
