Maintenance and Service Guide HP ProDesk 400 G1 Microtower HP ProDesk 480 G1 Microtower HP ProDesk 490 G1 Microtower HP ProDesk 400 G1 Small Form Factor

Fan sink
Description Spare part number
Fan sink for use in 400 and 490 models, standard 745054-001
Fan sink for use in 490 models, BFR/PVC free 748826-001
WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system
components to cool before touching.
NOTE: System board appearance may vary.
1. Prepare the computer for disassembly (Preparation for disassembly on page 42).
2. Remove the access panel (
Access panel on page 43).
3. Disconnect the fan cable from the system board connector labeled CPUFAN (1), and then loosen
the four silver captive Torx T15 screws that secure the heat sink to the system board.
CAUTION: Remove fan sink retaining screws in diagonally opposite pairs (as in an X) to even
the downward forces on the processor. The pins on the socket are very fragile and any damage to
them may require replacing the system board.
80 Chapter 5 Removal and replacement procedures: Microtower