HP Elite x2 G8 Maintenance And Service Manual page 81

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
on page 71 and
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.
Table 7-4 Failure classification by boot-up sequence
1. Power-on
1. No power on page 85
2. Intermittent power-on, shutdown,
reboot on page 87
3. AC adapter issue on page 88
4. Battery not recognized, not charging
on page 88
5. Battery discharges too fast on page
90
6. Burnt smell on page 91
a,b,c
similar symptoms
Failure classification by hardware devices
To determine failure by device, use this table.
Table 7-5 Failure classification by hardware devices
4. Display
1. Display anomalies on
page 102
2. Dead pixel on page 105
3. No video (internal) on
d
page 105
Table 7-5 Failure classification by hardware devices on page
2. POST
1.
2.
a
3.
4.
5. I/O devices
1. Keyboard on page 109
2. Keyboard pointing stick
(select products only) on
page 110
3. Keyboard backlight on
page 111
(Table 7-4 Failure classification by boot-up sequence
No video (with power) on page 91
Blinking lights on page 92
Diagnostic error messages on
page 93
BIOS password on page 93
6. Storage
1. Hard drive or solid-state
drive not recognized on
page 118
2. No boot to operating
system (no read-write
error) on page 119
Failure classification by boot-up sequence
71). This record helps isolate
3. Performance
1. Intermittent shutdown on page 94
b
2. Blue screen on page 96
3. Freeze at Windows Logo (hang or lockup)
on page 97
4. Electromagnetic Interference (EMI) on
page 98
5. No wake up on page 99
6. Unresponsive on page 100
7. Slow performance on page 101
8. HP Smart Adapter warning message on
page 101
9. Incorrect time and date on page 102
7. Mechanical
1. Noise (sound) on page
121
2. Fan runs constantly on
page 122
3. Thermal shutdown (hot)
on page 123
a
c
71