I have acquired a 512k 120v model. On first inspection the fuse was blown and diode at CR24 was burned out, I have replaced these and done a complete recap of the electrolytic on the analog and logic board plus the RIFA CAP at C38. On start up I get no bong and vertical bars as per the photo. This is usually associated with a ROM issues, I have pulled and reseated the ROMS and also re-soldered the ROM holders on the under side of the board with no change, I will try with a logic board etc of a 128k but thought it worthwhile asking this group.
One peculiar point is the top of C15-C17 on the analog board, seem to have cuts in the top, I haven't seen this before, is this normal or do they need replacing ?
View attachment IMG_7325.HEIC
View attachment IMG_7324.HEIC
View attachment IMG_7323.HEIC
View attachment IMG_7317.HEIC
One peculiar point is the top of C15-C17 on the analog board, seem to have cuts in the top, I haven't seen this before, is this normal or do they need replacing ?
View attachment IMG_7325.HEIC
View attachment IMG_7324.HEIC
View attachment IMG_7323.HEIC
View attachment IMG_7317.HEIC