HP Blade dc72 Reference Manual page 168

Removal and Replacement Procedures - Ultra-Slim Desktop (USDT) Chassis
Before the new optical drive can be used, the release latch must be attached.
1. Peel the backing off the adhesive on the release latch.
2. Without allowing the release latch to touch the optical drive, carefully align the holes on the
release latch with the pins on the side of the optical drive. Make sure the release latch is
oriented properly.
3. Insert the pin at the front of the optical drive into the hole at the end of the release latch 1,
and press firmly.
4. Insert the second pin 2, and press the entire release latch firmly to fasten the latch securely
to the optical drive.
To install the optical drive, reverse the removal steps.
8–6 433612-001 Service Reference Guide, dc7700