HP 280 G4 Maintenance And Service Manual page 6

4 Removal and replacement procedures ........................................................................................................... 16
Preparation for disassembly ............................................................................................................................... 16
Rubber feet .......................................................................................................................................................... 17
Access panel ......................................................................................................................................................... 18
Expansion card ..................................................................................................................................................... 19
Drives ................................................................................................................................................................... 22
Front bezel ........................................................................................................................................................... 26
WLAN module ...................................................................................................................................................... 27
Solid-state drive module ..................................................................................................................................... 28
Memory ................................................................................................................................................................ 29
RTC battery .......................................................................................................................................................... 31
Fan duct ................................................................................................................................................................ 32
Fan sink ................................................................................................................................................................ 33
Processor ............................................................................................................................................................. 34
Power supply ....................................................................................................................................................... 35
System board ....................................................................................................................................................... 37
Antenna cable ...................................................................................................................................................... 39
5 Computer Setup (F10) Utility ........................................................................................................................ 40
Computer Setup (F10) utilities ............................................................................................................................ 40
6 Troubleshooting without diagnostics ............................................................................................................ 45
Safety and comfort .............................................................................................................................................. 45
Before you call for technical support .................................................................................................................. 45
Helpful hints ........................................................................................................................................................ 46
Solving general problems .................................................................................................................................... 47
Solving power problems ...................................................................................................................................... 50
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Optical drive ....................................................................................................................................... 22
Hard drive .......................................................................................................................................... 24
DIMMs ................................................................................................................................................ 29
DDR4-SDRAM DIMMs ......................................................................................................................... 29
Populating DIMM sockets .................................................................................................................. 29
Removing and installing DIMMs ........................................................................................................ 30
System board callouts ....................................................................................................................... 38
Using Computer Setup (F10) Utilities ................................................................................................ 40
Computer Setup-Main ....................................................................................................................... 42
Computer Setup-Security ............................................................................................................... 42
Computer Setup-Configuration ...................................................................................................... 43
Computer Setup-Boot Options ....................................................................................................... 43
Computer Setup-Exit ...................................................................................................................... 44