HP 330 Service Information Manual page 48

Safety Precautions
Electrical Precautions
As with any electrical/electronic product, certain safety precautions must be practiced. These
safety precautions, when followed protect both you and the equipment from injury and possible
permanent damage.
WARNING
Always turn off the unit and remove the power cord before opening
the unit to remove or replace an assembly. If maintenance activity
requires power to be applied while the protective covers are removed,
proceed only with extreme caution using safe, live-unit maintenance
procedures. Do not touch energized components or parts with your
fingers. Heed and follow all "WARNING-HAZARDOUS VOLTAGE"
labels. Failure to follow these safety precautions may result in serious
injury, or worse.
System Board Installation
CAUTION
Do not use excessive force to seat system boards in the system slot
connectors.
If excessive force seems to be needed to install a board, remove
the board, and inspect the motherboard's connector for bent pins.
Straighten any pins that appear to be bent.
Remove the top cover and all boards above the one that is difficult to
seat.
Re-insert the board to the motherboard's connectors and adjust the
position of the board's connector to mate correctly with the moth-
erboard's connector. Carefully seat the board. Reinstall the other
boards in the same manner, then replace the top cover.
32 Assembly Replacement