Macintosh Classic II Hard Drive Removal

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 Apple considers this obsolete and " information about these products is no longer updated as of 9/1/98 "

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.

The cover is held in place by four (4) T-15 screws. Two (2) on the bottom

and two (2) under the top (handle)

The bottom ones are easy to remove

The top ones are a bit of a challenge due to the depth of the holes.

There was just not enough room to get a good grip on the driver.

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

Once loosened, the iFixit extension that came with my set, works perfectly to remove the screw,

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.

With the screws removed the cover will slide off.

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.

Here is what the inside looks like.

Power supply (Sweep Board)

Flyback Transformer

Video card

CRT

SCSI Hard drive

Hard drive on top with the Floppy drive on the bottom

Here is the Hard Drive. It is actually mounted upside down. You are looking at the drive controller board

Remove the power cable

Next remove the data cable. The red stripe always connects to pin 1 of the connector

To remove the cable, simply pull it toward the back. No locking tabs etc. on these.

There are two (2) Philips head screws that hold the HDD caddy. Remove those

The screws are M3 by 8mm machine screws

With the two (2) screws removed, simply remove the Hard Drive with caddy out of the chassis.

The drive is a Quantum ProDrive LPS 42S 40GB SCSI Hard Drive - Apple 940-40-9404