Recent content by asentientbot

Just for anyone else who comes across this in future -- she went ahead and replaced the 6522 and now it's starting and showing a perfect flashing floppy icon!! It'll be a while before we can test further as the drive doesn't work, but a big step in the right direction ☺️

Hi, My friend just got a Mac Plus, which was dusty but not obviously corroded anywhere; after cleaning and checking +5 V (4.98) and +12 V (12.15) rails, she powered it on and saw this: With 1 MB and 4 MB of RAM from her SE/30, it shows these (respectively): All symptoms are consistent for...

Hi again, I have some more questions about the PowerBook 100 from this thread. We weren't able to properly fix the missing LCD_VEE, but my friend got an isolated bench PSU for another project, and we realized she could temporarily create LCD_VEE with it to test further. She removed Q12 (page 11...

Thank you for the reply, sorry I missed this earlier. My friend already replaced all caps, including the LCD ones and C22 (twice). As mentioned above, they also cleaned under L2/L3/L4, cleaned and replaced U25, and tested all traces in the LCD_VEE circuit by checking continuity between the...

Hi, my friend replaced the FA7611 and it's completely unchanged, still 0.16 V at the "top" of C22 and the LCD_VEE test point. Since they tested the traces, caps, inductors and now replaced U25, are we correct in assuming the issue must be one of the resistors or diodes to the "left" of Q12? Or...

Thank you! We didn't see any other issues, and we found the FA7611 on aliexpress for a couple bucks, so they're going to try that.

Hey, sorry for being a pain but any other ideas? We are completely lost still 😰

Hi again, my friend removed, cleaned and resoldered U25, L2, L3, and L4 and now they're seeing 0.16 V on C22 and the LCD_VEE test point. Any other things to check? Thank you!

Thank you!! We will try that.

Hi, this is my first post so I apologize if I'm breaking any rules, please let me know. My friend bought a non-functional PowerBook 100; after fully cleaning and recapping, it turns on the backlight, chimes, and makes Mac OS sounds when pressing keys. However, the screen is completely blank...