Harman Kardon HK3700 Teardown

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Remove the mainboard

Remove all the screws holding down the main board and heat sink. Unplug the cable from the front panel if you can, or cut it if you can't. If you do cut it, it can be re-soldered later if you wish.
You can now remove the board from the frame.
I did not remove the transistors from the heat sink, but you can with a phillips screwdriver and something to separate the transistors from their thermal compound.

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