HP PC Hardware Diagnostics (UEFI) for video test..........................................................................................................111
Display assembly diagram................................................................................................................................................................ 111
Dead pixel................................................................................................................................................................................................................. 112
No video (internal) .............................................................................................................................................................................................. 112
No video (external)............................................................................................................................................................................................. 112
DisplayPort/VGA ................................................................................................................................................................................................. 113
HDMI ............................................................................................................................................................................................................................113
No or bad external video via docking...................................................................................................................................................114
Incorrect or missing color/distorted image.....................................................................................................................................114
Touch screen..........................................................................................................................................................................................................115
I/O devices ..........................................................................................................................................................................................................................116
Keyboard...................................................................................................................................................................................................................116
Keyboard pointing stick (select products only)..............................................................................................................................117
Keyboard backlight............................................................................................................................................................................................118
Touchpad ..................................................................................................................................................................................................................118
Network connectivity (RJ-45 jack)..........................................................................................................................................................119
Network connectivity wireless (WLAN) ..............................................................................................................................................119
WWAN........................................................................................................................................................................................................................120
USB ..............................................................................................................................................................................................................................120
Smart card reader............................................................................................................................................................................................. 121
Speaker, headphone - audio issues..................................................................................................................................................... 122
Thunderbolt (TB) ................................................................................................................................................................................................. 123
Storage..................................................................................................................................................................................................................................124
Hard drive or solid-state drive not recognized............................................................................................................................. 125
No boot to operating system (no read-write error) ................................................................................................................... 126
Read-write error ..................................................................................................................................................................................................127
Slow performance ............................................................................................................................................................................................ 128
Blue screen (BSOD) error............................................................................................................................................................................ 128
Noisy hard drive..................................................................................................................................................................................................128
Mechanical........................................................................................................................................................................................................................129
Noise (sound)........................................................................................................................................................................................................129
Fan runs constantly .........................................................................................................................................................................................130
Thermal shutdown (hot).................................................................................................................................................................................131
Additional information.......................................................................................................................................................................................................... 132
Acronyms............................................................................................................................................................................................................................132
Blinking lights and boot error codes...............................................................................................................................................................133
Processor not executing code.................................................................................................................................................................134
BIOS recovery code unable to find valid BIOS recovery image......................................................................................134
Memory module error....................................................................................................................................................................................134
Graphics Controller Error (No Controller)........................................................................................................................................134
Failure System Board Error........................................................................................................................................................................135
Intel Trusted Execution Technology (TXT) Error ...........................................................................................................................135
Sure Start unable to find valid BIOS Boot Block image.........................................................................................................135
Sure Start has identified a problem (Manual Recovery Policy Set)..............................................................................135
POST error messages and user actions.....................................................................................................................................................136
Routine maintenance for performance improvement ......................................................................................................................138
Common blue screen error messages ........................................................................................................................................................138
Error message list.............................................................................................................................................................................................138
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