Manual

Failure classication by hardware devices and mechanical
Table 7-4 Failure classication by hardware devices and mechanical
4. Display 5. I/O devices 6. Storage 7. Mechanical
1. Display anomalies
on page 98
2. Dead pixel on page 100
3. No video (internal)
on page 100
d
4. No video (external)
on page 101
d
5. DisplayPort/VGA
on page 101
6. HDMI on page 101
7. No or bad external video
via docking on page 102
8. Incorrect or missing color/
distorted image
on page 102
9. Touch screen
on page 103
1. Keyboard on page 104
2. Keyboard point stick
on page 105
3. Keyboard backlight
on page 105
4. TouchPad on page 106
5. Network Connectivity
Ethernet (RJ-45 jack)
on page 106
6. Network connectivity
wireless (WLAN)
on page 107
7. WWAN on page 108
8. USB on page 109
9. Smart card reader
on page 110
10. Speaker, headphone -
audio issues on page 111
11. Thunderbolt (TB)
on page 112
1. Hard drive/solid-state
drive not recognized
on page 114
2. No boot to operating
system (no read/write
error) on page 114
3. Read-write error
on page 115
4. Slow performance
on page 96
c
5. Blue screen (BSOD) error
on page 115
b
6. Noisy hard drive
on page 116
1. Fan error message - 90B
on page 117
2. Noise (sound)
on page 118
3. Fan runs constantly
on page 119
4. HP Thermal Monitor
on page 70
5. Stuck power button
on page 120
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.
●
Conrm that power sources are good, such as wall power type/adapter (110V/220V ac), power strip. Test
with a veried working AC outlet.
●
Check for compatibility issues between the computer and third-party devices, peripherals, noncertied
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, oor mats, fans (and other electronic motors). EMI may contribute to a display freeze issue or
lock-up.
General troubleshooting steps 65