KV-32HQ100B - Sony TV Service Manual (repair manual). Page 18

To remove the D2 board remove the two screws circled,
release the clips circled and ease the board gently away from
the support bracket.

To remove the D1 board first remove the D2 bracket by
removing the two screws (one on each side of the bracket)
and releasing the four clips (two on each side of the bracket).
The D1 board can then be removed using the same method as
the G board.

To remove the G Board first remove the G1 bracket by
removing the  screw circled and releasing the four clips (two
on each side of the bracket).
The G Board can then be removed by releasing the clips circled
and easing the board gently away from the support bracket.

To remove the G1 board release the three clips circled and
ease the board gently away from the support bracket.