Samsung ST200F Service Manual page 16

Disassembly and reassembly
(d) Run a safe open pry tool around the join of LOCKING PART to release the BACK COVER as illustrated in image.
Slightly wiggle the LOCKING PART to widen the gap. You'll have to apply a little force to remove it.
Fig 3-4
(e) Remove the BACK COVER ASSY.
BACK COVER ASSY
Fig 3-5
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