Burnt Smell; Post; No Video (With Power) - HP ZBook 14u G6 Maintenance And Service Manual

Table 8-13 Issues, possible causes, and fixes (continued)
Items
Tips and tricks

Burnt smell

Table 8-14 Issues, possible causes, and fixes
Items
Symptoms
Emits smoke, burnt smell
The sections below are intended for authorized service providers/technicians.

POST

No video (with power)

Table 8-15 Issues, possible causes, and fixes
Items
Symptoms
No video (black/blank image) but
●
have power
Light activity
●
No error messages
●
Fan noise
●
Procedures
6. Compare discharge time with a verified working battery (remove AC adapter)
using Hardware Diagnostics (UEFI) > Hard Drive Tests > Extensive Test > Loop
until error.
To conserve battery power, turn off Wireless On-Off button and other peripherals/USB
devices, applications, processes (in Task Manager) when not in use; also, reduce screen
brightness.
Follow HP instructions of how to maintain battery and increase battery life. Also
reference http://support.hp.com/us-en/document/c01297640?
jumpid=hpr_r1002_usen_link3.
Procedures
Possible causes
Defective on-board components.
Troubleshooting steps
General visual inspection
1. Disconnect the computer from power source (AC adapter and battery).
2. Inspect for visual damage on AC adapter and battery. Test on a known working
computer to isolate issue. If issue follows AC adapter or battery, replace it.
3. Inspect any sign of liquid spill on the computer (back of keyboard).
Further inspection on components
1. Inspect further sources internally after disassembling chassis, such as burnt or
damaged components.
2. If the issue persists, replace boards, AC adapter, and battery for safety concern
and report issues to HP.
Procedures
Possible causes
Failed display
Failed critical components (memory, hard drive, system board)
Loose connection
Recently added hardware
Common issues and possible solutions 103