HP ZBook Studio G4 Maintenance And Service Manual page 10

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Incorrect time and date ................................................................................................ 102
Display ............................................................................................................................................. 103
Display anomalies ......................................................................................................... 103
Symptom .................................................................................................... 103
Quick check ................................................................................................. 104
HP PC Hardware Diagnostics (UEFI) for video test ..................................... 104
Display assembly diagram ......................................................................... 105
Dead pixel ..................................................................................................................... 105
No video (internal) ........................................................................................................ 105
No video (external) ....................................................................................................... 106
DisplayPort/VGA ........................................................................................................... 106
HDMI .............................................................................................................................. 106
No or bad external video via docking ........................................................................... 107
Incorrect or missing color/distorted image .................................................................. 107
Touch screen ................................................................................................................. 108
I/O devices ....................................................................................................................................... 109
Keyboard ....................................................................................................................... 109
Keyboard point stick ..................................................................................................... 110
Keyboard backlight ....................................................................................................... 110
TouchPad ....................................................................................................................... 111
Network Connectivity Ethernet (RJ-45 jack) ................................................................ 111
Network connectivity wireless (WLAN) ........................................................................ 112
WWAN ............................................................................................................................ 113
USB ................................................................................................................................ 114
Smart card reader ......................................................................................................... 115
Speaker, headphone - audio issues .............................................................................. 116
Thunderbolt (TB) ........................................................................................................... 117
Thunderbolt 3 dock ....................................................................................................... 118
Storage ............................................................................................................................................ 119
Hard drive/solid-state drive not recognized ................................................................ 120
No boot to operating system (no read/write error) ..................................................... 120
Read-write error ........................................................................................................... 121
Slow performance ......................................................................................................... 121
Blue screen (BSOD) error .............................................................................................. 121
Noisy hard drive ............................................................................................................ 122
Mechanical ....................................................................................................................................... 123
Fan error message - 90B .............................................................................................. 123
Noise (sound) ................................................................................................................ 124
Fan runs constantly ...................................................................................................... 125
Thermal shutdown (hot) ............................................................................................... 126
Stuck power button ...................................................................................................... 127