Installing a memory module
before adding or removing memory modules. Regardless of the power-on state, voltage is always supplied to
the memory modules as long as the computer is plugged into an active AC outlet. Adding or removing
memory modules while voltage is present may cause irreparable damage to the memory modules or system
The memory module slots have gold-plated metal contacts. When upgrading the memory, it is important to
use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting from
having incompatible metals in contact with each other.
Static electricity can damage the electronic components of the computer or optional cards. Before beginning
these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal
object. For more information, see
When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the
Remove/disengage any security devices that prohibit opening the computer.
Remove all removable media, such as a USB flash drive, from the computer.
Turn off the computer properly through the operating system, and then turn off any external devices.
Disconnect the power cord from the AC outlet and disconnect any external devices.
Remove the access panel.
For instructions on removing the access panel from a 35W model, see
of the HP EliteDesk 800 35W on page
For instructions on removing the access panel from any other model, see
panel on page
For instructions, see
to cool before you touch them.
Chapter 3 Hardware upgrades
You must disconnect the power cord and wait approximately 30 seconds for the power to drain
Electrostatic discharge on page
Removing the access panel on page
To reduce risk of personal injury from hot surfaces, allow the internal system components
Removing the access panel
Removing the access