Dell P157G003 Service Manual page 4

Power-button board......................................................................................................................................................... 39
Removing the power-button board.........................................................................................................................39
Installing the power-button board...........................................................................................................................40
Power button with optional fingerprint reader........................................................................................................... 41
Removing the power button with optional fingerprint reader...........................................................................41
Installing the power button with optional fingerprint reader............................................................................ 42
System board..................................................................................................................................................................... 43
Removing the system board..................................................................................................................................... 43
Installing the system board....................................................................................................................................... 46
Speakers.............................................................................................................................................................................. 48
Removing the speakers..............................................................................................................................................48
Installing the speakers................................................................................................................................................ 49
Palm-rest and keyboard assembly................................................................................................................................ 50
Removing the palm-rest and keyboard assembly................................................................................................50
Installing the palm-rest and keyboard assembly...................................................................................................51
Chapter 3: Drivers and downloads............................................................................................... 53
Chapter 4: System setup............................................................................................................. 54
BIOS overview................................................................................................................................................................... 54
Entering BIOS setup program........................................................................................................................................ 54
Navigation keys..................................................................................................................................................................54
Boot Sequence.................................................................................................................................................................. 55
System setup options.......................................................................................................................................................55
System and setup password.......................................................................................................................................... 59
Assigning a system setup password....................................................................................................................... 59
Deleting or changing an existing system setup password.................................................................................60
Clearing BIOS (System Setup) and System passwords.................................................................................... 60
Updating the BIOS.............................................................................................................................................................61
Updating the BIOS in Windows.................................................................................................................................61
Updating the BIOS using the USB drive in Windows.......................................................................................... 61
Updating the BIOS from the F12 One-Time boot menu..................................................................................... 61
Chapter 5: Troubleshooting.........................................................................................................63
Handling swollen Lithium-ion batteries........................................................................................................................ 63
Locate the Service Tag or Express Service Code of your Dell computer ..............................................63
System-diagnostic lights................................................................................................................................................. 64
SupportAssist | On-board Diagnostics.........................................................................................................................65
Recovering the operating system................................................................................................................................. 65
WiFi power cycle............................................................................................................................................................... 65
Chapter 6: Getting help and contacting Dell................................................................................ 67
4 Contents