HP ZBook Fury 17 G7 - Failure Classification Methods

Failure classication
Failure classication is a breakdown of dierent types of failures and symptoms that could occur during the
boot-up sequence.
Failure classication by boot-up sequence on page 104 and Failure classication by hardware devices
on page 105 represent the failure classication for common notebook failures.
Failure classication 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 ash, or diagnostics error.
3. Performance: Common issues are Intermittent Loss of Power, Blue Screen, Hang. In many cases, issues can
be identied and associated with particular hardware (for example, display or storage).
Failure classication 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 dierent groups. For example, No Video can belong to (1) power-on or (4)
display; but ickering when turned on should be listed in (4) display. Or, in another example, a blue screen can be
caused by a driver conict 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 classication by boot-up sequence on page 104 and
Failure classication 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 oered on certain
hardware congurations; therefore, you can classify a Bluetooth issue under I/O Device if needed.
Failure classication by boot-up sequence
Use this table to locate failure classication information.
104 Chapter 7 Troubleshooting guide ENWW