iMac 21.5" EMC 2428 Repairability Score: 7 out of 10 (10 is easiest to repair)
The front glass panel and LCD are quite easy to remove for accessing all the hardware underneath.
RAM, hard drive, and optical drive can be replaced with relative ease, as long as you don't mind taking out the LCD (for the drives).
Limited use of adhesives (pretty much all the fasteners are mechanical) make disassembly pretty straightforward.
Replacing the CPU and GPU is possible to do, but you need to remove the logic board from the computer.
Removing the logic board is a pain, since you have to disconnect a bunch of connectors, and wiggle it out of the machine.
Making the LCD and glass spotless when reassembling the machine is nearly impossible. (compressed air is useful when trying to remove dust from the display or glass panel)
Like being able to see the guts of your machines? Check out our iPhone 4 transparent rear panel!
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