Macintosh 128K Repairability Score 7 out of 10 (10 is easiest to repair).

Once you’re inside, it’s simple and straightforward to replace any of the main components: floppy drive, power supply, logic board, or CRT display.

No adhesive anywhere.

User-replaceable clock battery.

Limited upgradability: The RAM is soldered to the logic board and can’t be replaced, and there’s no slot/port to add an internal drive. However, you can expand storage via an optional external floppy drive.

The case is fairly difficult to open, with deeply recessed screws and a tight panel fit.

There are some dangerous high voltages on both the power supply and the CRT that make repair potentially hazardous.