Macintosh Classic II Hard Drive Removal

ID: 157946

Description:

Steps:

  1. Here is one of the vintage computers in my possession. It is a Macintosh Classic II M4150. Apple considers this obsolete and " information about these products is no longer updated as of 9/1/98 "
  2. On powering it up, It originally greeted me with a checkerboard pattern that quickly converted into this pattern. The checkerboard pattern is/was commonly caused by bad Ram memory. Considering the age of this computer, leaking capacitors are a strong possibility. Time to check.
  3. This computer contains a CRT. That means there are some high voltages involved when working on this. Use proper CRT safety while working on it.
  4. The cover is held in place by four (4) T-15 screws. Two (2) on the bottom
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  5. and two (2) under the top (handle)
  6. The bottom ones are easy to remove
  7. The top ones are a bit of a challenge due to the depth of the holes.
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  8. There was just not enough room to get a good grip on the driver.
  9. Luckily this iFixit driver has a hole on the top part. I used a tool to gain some mechanical advantage. While applying downward pressure on the driver, turn the tool to the left to loosen the screw
  10. Once loosened, the iFixit extension that came with my set, works perfectly to remove the screw,
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  11. Here are the four (4) screws. The two bottom screws are M4X15mm The top screws are those typical found in plastic to sheet metal joints.
  12. With the screws removed the cover will slide off.
  13. BEst practice is to lay it down and pull the case straight up. It may take some force due to the tight fit and years of storage etc.
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  14. Here is what the inside looks like.
  15. Remember the High Voltage. Do not touch anything with bare hands etc. Right now it's look but don't touch
  16. Power supply (Sweep Board)
  17. Flyback Transformer
  18. Video card
  19. CRT
  20. SCSI Hard drive
  21. Hard drive on top with the Floppy drive on the bottom
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  22. Here is the Hard Drive. It is actually mounted upside down. You are looking at the drive controller board
  23. Remove the power cable
  24. Next remove the data cable. The red stripe always connects to pin 1 of the connector
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  25. To remove the cable, simply pull it toward the back. No locking tabs etc. on these.
  26. There are two (2) Philips head screws that hold the HDD caddy. Remove those
  27. The screws are M3 by 8mm machine screws
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  28. With the two (2) screws removed, simply remove the Hard Drive with caddy out of the chassis.
  29. The drive is a Quantum ProDrive LPS 42S 40GB SCSI Hard Drive - Apple 940-40-9404
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