Read-write error ........................................................................................................... 134
Slow performance ......................................................................................................... 134
Blue screen (BSOD) error .............................................................................................. 134
Noisy hard drive ............................................................................................................ 135
Mechanical ....................................................................................................................................... 136
Fan error message - 90B .............................................................................................. 136
Noise (sound) ................................................................................................................ 137
Fan runs constantly ...................................................................................................... 138
Thermal shutdown (hot) ............................................................................................... 139
Stuck power button ...................................................................................................... 140
Additional information ...................................................................................................................................... 140
Acronyms ......................................................................................................................................... 140
Blinking lights and boot error codes ............................................................................................... 142
Processor not executing code ...................................................................................... 142
BIOS recovery code unable to nd valid BIOS recovery image ..................................... 142
Memory module error ................................................................................................... 142
Graphics Controller Error (No Controller) ..................................................................... 143
Failure - System Board Error ........................................................................................ 143
Intel Trusted Execution Technology (TXT) Error .......................................................... 143
Sure Start unable to nd valid BIOS Boot Block image ................................................ 143
Sure Start has identied a problem (Manual Recovery Policy Set) .............................. 144
POST Error Messages and User Actions .......................................................................................... 144
Routine Maintenance for Performance Improvement .................................................................... 146
Common Blue Screen Error Messages ............................................................................................ 146
Error message list ......................................................................................................... 146
Bug check symbolic names ........................................................................................... 146
Microsoft general troubleshooting of Windows bug check codes ............................... 147
Use Windows Debugging Tool ......................................................................................................... 147
Windows Software Development Kit (SDK) .................................................................. 148
Display Issue: Pixel Anomalies ........................................................................................................ 152
Cable management ......................................................................................................................... 153
Connector types .............................................................................................................................. 154
8 Using HP PC Hardware Diagnostics (UEFI) ..................................................................................................... 156
Downloading HP PC Hardware Diagnostics (UEFI) to a USB device .................................................................. 156
Additional BIOS crisis recovery tool .................................................................................................................. 157
9 Specications ............................................................................................................................................ 158
Computer specications .................................................................................................................................... 158
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