Intermittent Power-On, Shutdown, Reboot - HP ZBook Fury 17 G7 Maintenance And Service Manual

Table 7-9 Issues, possible causes, and fixes (continued)
Items
Tips

Intermittent power-on, shutdown, reboot

Use this information to troubleshoot power-on, shutdown, and reboot issues.
Table 7-10 Issues, possible causes, and fixes
Items
Symptoms
Does not always turn on
●
Intermittently hangs
●
Intermittently shuts down
●
Spontaneously reboots
●
The following steps are for authorized providers or technicians.
126 Chapter 7 Troubleshooting guide
Procedures
system) on page
nonessential parts.
2. If the computer still does not boot, replace system board.
Computer automatically boots without pressing power button when the RTC 3 V battery
is removed. Therefore, after the service door and RTC 3 V battery are removed, you do
not have to press power button from top side.
In essential hardware configuration, mWS G1 and G2 may require discrete graphics
processing unit (GPU) to boot. However, mWS G3 can boot with integrated graphics.
Procedures
Possible causes
Electrical short, fluctuating power source, unstable power rails, loose connections, bent pins, stray
wires, dust, obvious damage, nearly faulty parts (bulging or leaking capacitor).
Potentially turn into a no-power issue
Troubleshooting steps
1. Visually check power ports on both AC adapter and computer sides.
2. Inspect power sources:
a. Verify that the AC adapter is working correctly. Use a confirmed working adapter to test.
b. Verify that battery is not depleted while system is in the 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, and others).
2. Perform visual check for loose connections, bent pins, stray wires, dust, nearly faulty parts
(bulging or leaking capacitor).
3. Test essential hardware configuration
119, 13. Replace the system board on page
(No power on page 124).
124.
(11. Test with minimum configuration on page
119) by removing
118)
ENWW