Examine The Environment - HP Z VR Backpack G1 Maintenance And Service Manual

Failure classification by hardware devices and mechanical
Table 7-4 Failure classification by hardware devices and mechanical
4. Display
1. Display anomalies
on page 65
2. Dead pixel on page 67
3. No video (internal)
on page 67
4. No video (external)
on page 68
5. DisplayPort/VGA
on page 68
6. HDMI on page 68
7. No or bad external video
via docking on page 69
8. Incorrect or missing color/
distorted image
on page 69
b,c,d similar symptoms

2. Examine the environment

It is important to examine the computer's environment. If you can quickly identify the cause of the issue, fewer
resolution steps may be needed. Perform the following environment inspections:
● Check all cables and connections to be sure that there are no loose connections.
● Confirm that power sources are good, such as wall power type/adapter (110V/220V ac), power strip. Test
with a verified working AC outlet.
● Check for compatibility issues between the computer and third-party devices, peripherals, noncertified
devices, incompatible hardware (i.e., Mac OS device). Incompatibility can result in blue screen errors,
improper operation, and so on.
● Isolate the computer from sources of electromagnetic interference (EMI), such as cell phones, 2-way
radios, floor mats, fans (and other electronic motors). EMI may contribute to a display freeze issue or lock-
up.
5. I/O devices
1. Network Connectivity
Ethernet (RJ-45 jack)
on page 71
2. Network connectivity
wireless (WLAN)
d
on page 72
3. USB on page 73
d
4. Speaker, headphone -
audio issues on page 74
5. Thunderbolt (TB)
on page 75
6. Storage
1. Hard drive/solid-state
drive not recognized
on page 77
2. No boot to operating
system (no read/write
error) on page 77
3. Read-write error
on page 78
4. Slow performance
on page 63 c
5. Blue screen (BSOD) error
on page 78 b
6. Noisy hard drive
on page 79
General troubleshooting steps
7. Mechanical
1. Fan error message - 90B
on page 80
2. Noise (sound)
on page 81
3. Fan runs constantly
on page 82
4. HP Thermal Monitor
on page 38
5. Stuck power button
on page 83
33