Intermittent Power-On, Shutdown, Reboot - HP Z VR Backpack G1 Maintenance And Service Manual

Intermittent power-on, shutdown, reboot

Items
Symptoms
● Does not always turn on
● Intermittently hangs
● Intermittently shuts down
● Spontaneously reboots
The sections below are intended for authorized service providers/technicians.
Procedures
Possible causes
Electrical short, fluctuating power source, unstable power rails, loose connections, bent pins, stray
wires, dust, obvious damage, nearly faulty parts (bulging/leaking capacitor).
Potentially will turn into a no power issue soon
Troubleshooting steps
1. Visually check power ports on both AC adapter and computer sides.
2. Inspect power sources:
a. Verify AC adapter working correctly. Use a confirmed working adapter to test.
b. Verify that battery is not depleted while system is in Sleep state. Test with a confirmed
working battery.
1. Follow actions in No Power on page
a. Be sure that AC adapter has correct DC voltage.
b. Verify battery - test with a confirmed working battery.
c. Verify that power button is not stuck.
d. Verify that power connector is not loose.
e. Remedy loose connections and reseat major components (processor, memory, GPU,
hard drive/solid-state drive, etc.).
2. Perform visual check for loose connections, bent pins, stray wires, dust, nearly faulty parts
(bulging/leaking capacitor).
3. Test essential hardware configuration
a. If system boots, reinstall nonessential hardware one component at a time to isolate
issue.
b. If system does not boot, replace essential hardware with verified working parts, one
component at a time. If system still does not boot, replace system board.
(No Power on page 47).
47.
(11. Test with minimum configuration on page
Common issues and possible solutions
43)
49