HP Deskpro EN Supplementary Manual page 65

4. Remove the computer cover. Refer to "Removing the
Computer Cover" in Chapter 3.
5. Locate the jumper labeled E50.
Location of the E50 Jumper and Pins 1-3 on the System Board
6. Remove the jumper from pins 1 and 2, place it on pins 2
and 3 for approximately 30 seconds, then return it to pins 1
and 2.
7. Replace the computer cover.
8. Reconnect the external devices.
9. Plug in the computer and turn on power.
10. If you normally lock the Smart Cover Lock, relock it using
Computer Setup.
Guide to Features & Upgrades B-5