Warnings and cautions
WARNING! Any surface or area of the equipment marked with this symbol indicates the presence of a
hot surface or hot component. If this surface is contacted, the potential for injury exists. To reduce the risk of injury from a hot component, enable the surface to cool before touching.
WARNING! 
Any surface or area of the equipment marked with this symbol indicates the presence of an
electrical shock hazard. To reduce the risk of injury from electrical shock, do not open any enclosed area marked with this symbol.
WARNING! To reduce the risk of electric shock or damage to your equipment:
—Do not disable the power cord grounding plug. The grounding plug is an important safety feature.
—Plug the power cord in a grounded (earthed) outlet that is easily accessible at all times.
—Disconnect power from the equipment by unplugging the power cord from the electrical outlet.
WARNING! To reduce the risk of serious injury, read the Safety & Comfort Guide. It describes proper computer setup, posture, health, and work habits for computer users, and provides important electrical and mechanical safety information. This guide is located at http://www.hp.com/ergo and on the documentation CD (if one is included with the product).
WARNING! If a product is shipped in packaging marked with this symbol, 
, the product must always be lifted by two persons to avoid personal injury due to product weight.
CAUTION: Static electricity can damage the electronic components of the computer. Before beginning these procedures, be sure you discharge static electricity by briefly touching a grounded metal object.
CAUTION: To prevent damage to the computer, observe the following Electrostatic Discharge (ESD) precautions while performing the system parts removal and replacement procedures:
—Work on a
—Wear a static strap to ensure that any accumulated electrostatic charge is discharged from your body to the ground.
—Create a common ground for the equipment you are working on by connecting the
NOTE: HP accessories are for use in HP computer products. They have been extensively tested for reliability and are manufactured to high quality standards.
2 Thunderbolt 2 PCIe Card Installation