Ac Adapter Issue - HP ZBook Power G11 Maintenance And Service Manual

Table 7-10 Issues, possible causes, and fixes (continued)
Items

AC adapter issue

Use this information to troubleshoot AC adapter issues.
Table 7-11 Issues, possible causes, and fixes
Symptoms
● No sign of power
● No boot
● No rear power light
● No front power light
● Battery does not charge when AC
adapter is connected
Procedures
1. Follow actions in No power on page 96
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
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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.
Solution
Possible causes
AC adapter and others (for example, external power source).
Troubleshooting steps
Quick check
1. Verify external power source
2. Remove all external devices, including docking station.
3. Perform a hard reset for the computer
4. Disconnect and reassemble the power cord and adapter in case the adapter
experienced short circuit, over current, over temperature events.
5. Use a verified working adapter. If the computer operates normally, there is a
problem with the original adapter.
6. Verify that the AC adapter works on a verified working computer. If the
computer operates normally, there is no problem with the adapter. See
Smart Adapter warning message on page 113
().
(11. Test with minimum configuration on page 91
(2. Examine the environment on page 82
(8. Hard reset on page 89
() for further information.
AC adapter issue
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HP
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