HP zx5000 - Manual (Page 136)

Removal and Replacement Procedures
Maintenance and Service Guide 5–29
✎
Steps 7 and 8 apply only to notebook models with a Mobile
Intel Pentium 4 or Intel Pentium 4 processor. The processor
was removed with the heat sink in Section 5.7 to avoid damaging
the pins.
7. Align the processor so that the gold triangle 1 is in the
lower- right corner. Press the processor 2 straight down
into the socket to install it.
8. Use a flat-bladed screwdriver to turn the processor lock
screw 3 one-quarter turn clockwise to lock the processor
in the socket.
Replacing the Processor