Dell Vostro 3681 Service Manual page 4

Installing the 2230 solid-state drive............................................................................................................................ 33
M.2 2280 Solid state drive................................................................................................................................................. 34
Removing the 2280 solid-state drive.......................................................................................................................... 34
Installing the 2280 solid-state drive............................................................................................................................ 35
WLAN Card.......................................................................................................................................................................... 36
Removing the WLAN card............................................................................................................................................36
Installing the WLAN card.............................................................................................................................................. 37
SD card................................................................................................................................................................................. 39
Removing the media card reader................................................................................................................................ 39
Installing the media card reader...................................................................................................................................39
Power supply unit................................................................................................................................................................ 40
Removing the power-supply unit.................................................................................................................................40
Installing the power-supply unit................................................................................................................................... 42
Heatsink assembly...............................................................................................................................................................45
Removing the heatsink assembly................................................................................................................................ 45
Installing the heatsink assembly...................................................................................................................................46
Processor..............................................................................................................................................................................47
Removing the processor............................................................................................................................................... 47
Installing the processor................................................................................................................................................. 49
System board.......................................................................................................................................................................50
Removing the system board........................................................................................................................................ 50
Installing the system board...........................................................................................................................................53
4 Troubleshooting......................................................................................................................... 57
Real-Time Clock (RTC Reset)........................................................................................................................................... 57
System diagnostic lights..................................................................................................................................................... 57
Diagnostic error messages................................................................................................................................................. 58
System error messages....................................................................................................................................................... 61
Recovering the operating system...................................................................................................................................... 61
Flashing BIOS (USB key)....................................................................................................................................................62
Flashing the BIOS................................................................................................................................................................ 62
WiFi power cycle................................................................................................................................................................. 62
5 Getting help and contacting Dell..................................................................................................63
4 Contents