Burnt Smell; Post; No Video (With Power) - HP ZBook 15 G4 Maintenance And Service Manual

Burnt smell

Symptoms
Emits smoke, burnt smell
The sections below are intended for authorized service providers/technicians.

POST

No video (with power)

Symptoms
No video (black/blank image) but
●
have power
Light activity
●
● No error messages
● Fan noise
● Hard drive light blinking and hard
drive noise
Reference "HP Notebook Mobile Workstations - Improving Battery Performance
(Windows 10, 8, 7, Vista)" at
jumpid=hpr_r1002_usen_link3
Reference video "Testing and Calibrating the Battery on PC Notebooks" at:
http://www8.hp.com/h22157/video-gallery/us/en/customer-care/2536294556001/
testing-and-calibrating-the-battery-on-hp-notebook-pcs-in-windows-8/video/
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.
Possible causes
Failed display
Failed critical components (memory, hard drive, system board)
Loose connection
Recently added hardware
NOTE: Assume the computer has not previously been set up for multiple displays.
Troubleshooting steps
Quick check
1. Verify that system light activity is OK.
http://support.hp.com/us-en/document/c01297640?
Common issues and possible solutions 101