HP EliteDesk 405 G4 Desktop Mini Maintenance And Service Manual page 6

4 Removal and replacement procedures ........................................................................................................... 15
Warnings and cautions ........................................................................................................................................ 15
Preparation for disassembly ............................................................................................................................... 16
Front bezel dust filter .......................................................................................................................................... 16
Access panel ......................................................................................................................................................... 17
Front bezel ........................................................................................................................................................... 18
Ambient thermal sensor ...................................................................................................................................... 19
Speaker ................................................................................................................................................................ 20
Hard drive ............................................................................................................................................................. 21
Hard drive connector ........................................................................................................................................... 22
Drive cage ............................................................................................................................................................ 23
M.2 PCIe solid state drive (SSD) ........................................................................................................................... 24
WLAN module ...................................................................................................................................................... 26
Battery ................................................................................................................................................................. 28
Expansion connector board ................................................................................................................................. 30
Memory modules ................................................................................................................................................. 31
Fan ........................................................................................................................................................................ 35
Heat sink .............................................................................................................................................................. 36
Processor ............................................................................................................................................................. 38
System board ....................................................................................................................................................... 39
Internal WLAN antenna cables ............................................................................................................................ 43
Changing from desktop to tower configuration .................................................................................................. 45
5 Troubleshooting without diagnostics ............................................................................................................ 46
Safety and comfort .............................................................................................................................................. 46
Before you call for technical support .................................................................................................................. 46
Helpful hints ........................................................................................................................................................ 47
Solving general problems .................................................................................................................................... 48
Solving power problems ...................................................................................................................................... 51
Solving hard drive problems ................................................................................................................................ 52
Solving media card reader problems ................................................................................................................... 54
Solving display problems .................................................................................................................................... 55
Solving audio problems ....................................................................................................................................... 59
Solving printer problems ..................................................................................................................................... 60
Solving keyboard and mouse problems .............................................................................................................. 61
Solving hardware installation problems ............................................................................................................. 63
Solving network problems .................................................................................................................................. 64
Solving memory problems .................................................................................................................................. 66
vi
Memory module specifications ......................................................................................................... 31
Removing memory modules ............................................................................................................. 31
System board components ............................................................................................................... 42