Hard drive/solid-state drive not recognized ................................................................  130
No boot to operating system (no read/write error) .....................................................  130
Read-write error ...........................................................................................................  131
Slow performance ......................................................................................................... 131
Blue screen (BSOD) error ..............................................................................................  131
Noisy hard drive ............................................................................................................  132
Mechanical ....................................................................................................................................... 133
Fan error message - 90B ..............................................................................................  133
Noise (sound) ................................................................................................................ 134
Fan runs constantly ......................................................................................................  135
Thermal shutdown (hot) ............................................................................................... 136
Stuck power button ......................................................................................................  136
Additional information ......................................................................................................................................  137
Acronyms ......................................................................................................................................... 137
Blinking lights and boot error codes ............................................................................................... 138
Processor not executing code ......................................................................................  138
BIOS recovery code unable to îžnd valid BIOS recovery image ..................................... 138
Memory module error ................................................................................................... 138
Graphics Controller Error (No Controller) .....................................................................  139
Failure - System Board Error ........................................................................................  139
Intel Trusted Execution Technology (TXT) Error ..........................................................  139
Sure Start unable to îžnd valid BIOS Boot Block image ................................................  139
Sure Start has identiîžed a problem (Manual Recovery Policy Set) .............................. 140
POST error messages and user actions ..........................................................................................  140
Routine maintenance for performance improvement ...................................................................  142
Common blue screen error messages ............................................................................................  142
Error message list ......................................................................................................... 142
Bug check symbolic names ........................................................................................... 142
Microsoft general troubleshooting of Windows bug check codes ............................... 143
Use Windows Debugging Tool ......................................................................................................... 143
Windows Software Development Kit (SDK) .................................................................. 144
Display issue: pixel anomalies ........................................................................................................ 148
Cable management .........................................................................................................................  149
Connector types ..............................................................................................................................  150
9  Computer Setup (BIOS), TPM, and HP Sure Start ...........................................................................................  153
Using Computer Setup ....................................................................................................................................... 153
Starting Computer Setup ................................................................................................................  153
Navigating and selecting in Computer Setup .................................................................................  153
Restoring factory settings in Computer Setup ...............................................................................  153
Updating the BIOS ...........................................................................................................................  154
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