HP ZBook Fury 17 G7, Maintenance And Service Manual, Page: 118 / 232

Failure classification
Failure classification is a breakdown of different types of failures and symptoms that could occur during the
boot-up sequence.
Failure classification by boot-up sequence on page 104 and Failure classification by hardware devices
on page 105 represent the failure classification for common notebook failures.
Failure classification by boot-up sequence on page 104 categorizes failures by the boot-up sequence.
1. Power-on: Common issues are no power, recycle, or reboot.
2. POST: Common issues are no boot (despite power), light flash, or diagnostics error.
3. Performance: Common issues are Intermittent Loss of Power, Blue Screen, Hang. In many cases, issues can
be identified and associated with particular hardware (for example, display or storage).
Failure classification by hardware devices on page 105 categorizes failures by hardware:
● Display
●
I/O (input/output) devices
●
Storage
●
Mechanical
A single symptom can be listed under different groups. For example, No Video can belong to (1) power-on or (4)
display; but flickering when turned on should be listed in (4) display. Or, in another example, a blue screen can be
caused by a driver conflict in performance (4), but it can also be caused by a defective hard drive under (6)
storage. Therefore, failures that share similar symptoms are noted.
If possible, make a record of the failure symptom, the phase of the boot-up sequence where the failure occurs,
and the most likely location in the failure tree (
Failure classification by boot-up sequence on page 104 and
Failure classification by hardware devices on page 105 ). This record helps isolate the issue and indicate the next
steps. For example, when the computer is running the operating system, it can experience an issue with (4)
display, (5) I/O devices (keyboard, wireless, and so on), (6) storage, or (7) mechanical components (stuck
buttons, thermal shutdown, and so on).
NOTE: Uncategorized is used if an issue found is not listed. For example, Bluetooth is offered on certain
hardware configurations; therefore, you can classify a Bluetooth issue under I/O Device if needed.
Failure classification by boot-up sequence
Use this table to locate failure classification information.
104 Chapter 7 Troubleshooting guide ENWW