Dead pixel.................................................................................................................................................................................................................107
No video (internal) ..............................................................................................................................................................................................107
No video (external).............................................................................................................................................................................................107
DisplayPort/VGA................................................................................................................................................................................................108
HDMI ...........................................................................................................................................................................................................................108
No or bad external video via docking..................................................................................................................................................109
Incorrect or missing color/distorted image....................................................................................................................................109
Touch screen..........................................................................................................................................................................................................110
I/O devices ........................................................................................................................................................................................................................... 111
Keyboard....................................................................................................................................................................................................................111
Keyboard pointing stick (select products only)............................................................................................................................. 112
Keyboard backlight............................................................................................................................................................................................113
Touchpad ..................................................................................................................................................................................................................113
Network connectivity (RJ-45 jack)..........................................................................................................................................................114
Network connectivity wireless (WLAN) ..............................................................................................................................................114
WWAN......................................................................................................................................................................................................................... 115
USB ............................................................................................................................................................................................................................... 115
Smart card reader .............................................................................................................................................................................................116
Speaker, headphone - audio issues.......................................................................................................................................................117
Thunderbolt (TB) ..................................................................................................................................................................................................118
Storage..................................................................................................................................................................................................................................119
Hard drive or solid-state drive not recognized.............................................................................................................................120
No boot to operating system (no read-write error) .................................................................................................................... 121
Read-write error ................................................................................................................................................................................................. 122
Slow performance ............................................................................................................................................................................................ 123
Blue screen (BSOD) error............................................................................................................................................................................ 123
Noisy hard drive.................................................................................................................................................................................................. 123
Mechanical.........................................................................................................................................................................................................................124
Noise (sound).........................................................................................................................................................................................................124
Fan runs constantly ......................................................................................................................................................................................... 125
Thermal shutdown (hot)................................................................................................................................................................................ 126
Additional information...........................................................................................................................................................................................................127
Acronyms.............................................................................................................................................................................................................................127
Blinking lights and boot error codes...............................................................................................................................................................128
Processor not executing code.................................................................................................................................................................129
BIOS recovery code unable to find valid BIOS recovery image...................................................................................... 129
Memory module error....................................................................................................................................................................................129
Graphics Controller Error (No Controller)........................................................................................................................................ 129
Failure System Board Error........................................................................................................................................................................130
Intel Trusted Execution Technology (TXT) Error ...........................................................................................................................130
Sure Start unable to find valid BIOS Boot Block image.........................................................................................................130
Sure Start has identified a problem (Manual Recovery Policy Set)..............................................................................130
POST error messages and user actions......................................................................................................................................................131
Routine maintenance for performance improvement ......................................................................................................................133
Common blue screen error messages ........................................................................................................................................................133
Error message list.............................................................................................................................................................................................133
Bug check symbolic names.......................................................................................................................................................................134
Microsoft general troubleshooting of Windows bug check codes...............................................................................134
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