Dell P138G Service Manual page 5

Removing the sensor board.................................................................................................................................... 104
Installing the sensor board...................................................................................................................................... 105
LED board..........................................................................................................................................................................106
Removing the LED board......................................................................................................................................... 106
Installing the LED board........................................................................................................................................... 108
Smart card reader........................................................................................................................................................... 109
Removing the smart card reader (optional)........................................................................................................109
Installing the smart card reader (optional)............................................................................................................111
SIM card slot filler............................................................................................................................................................ 112
Removing the SIM card slot filler........................................................................................................................... 112
Installing the SIM card slot filler..............................................................................................................................113
Palm-rest assembly..........................................................................................................................................................113
Removing the palm-rest............................................................................................................................................113
Installing the palm-rest..............................................................................................................................................115
Chapter 3: Drivers and downloads...............................................................................................117
Chapter 4: BIOS setup................................................................................................................118
BIOS overview...................................................................................................................................................................118
Entering BIOS setup program....................................................................................................................................... 118
Navigation keys.................................................................................................................................................................118
One time boot menu........................................................................................................................................................ 119
System setup options......................................................................................................................................................119
Updating the BIOS...........................................................................................................................................................128
Updating the BIOS in Windows.............................................................................................................................. 128
Updating the BIOS in Linux and Ubuntu.............................................................................................................. 129
Updating the BIOS using the USB drive in Windows........................................................................................ 129
Updating the BIOS from the F12 One-Time boot menu................................................................................... 129
System and setup password......................................................................................................................................... 130
Assigning a system setup password......................................................................................................................130
Deleting or changing an existing system setup password................................................................................ 131
Clearing BIOS (System Setup) and System passwords..........................................................................................131
Chapter 5: Troubleshooting....................................................................................................... 132
Handling swollen Lithium-ion batteries.......................................................................................................................132
Dell SupportAssist Pre-boot System Performance Check diagnostics.............................................................. 132
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 133
Built-in self-test (BIST)..................................................................................................................................................133
M-BIST......................................................................................................................................................................... 133
LCD Power rail test (L-BIST)..................................................................................................................................134
LCD Built-in Self Test (BIST)..................................................................................................................................134
System-diagnostic lights................................................................................................................................................134
Recovering the operating system................................................................................................................................136
Real-Time Clock (RTC Reset)...................................................................................................................................... 136
Auto RTC reset................................................................................................................................................................ 136
Backup media and recovery options........................................................................................................................... 137
WiFi power cycle.............................................................................................................................................................. 137
Drain residual flea power (perform hard reset)........................................................................................................ 137
Contents 5