HP Elite Dragonfly 13.5 Maintenance and Service Guide - Page 86

AC adapter issue, Use this information to troubleshoot AC adapter issues.

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Table 6-10 Issues, possible causes, and fixes (continued) Items Procedures 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 (11. Test with minimum configuration on page 70) 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. AC adapter issue Use this information to troubleshoot AC adapter issues. Table 6-11 Issues, possible causes, and fixes Solution Symptoms ● No sign of power ● No boot ● No rear power light ● No front power light ● Battery does not charge when AC adapter is connected Possible causes AC adapter and others (for example, external power source). Troubleshooting steps Quick check 1. Verify external power source (2. Examine the environment on page 61). 2. Remove all external devices, including docking station. 3. Perform a hard reset for the computer (8. Hard reset on page 68). 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 HP Smart Adapter warning message on page 90 for further information. Verify AC adapter 1. Remove working battery. 2. Verify that AC adapter is compatible with product. Verify that part number is for this computer if possible. 3. Inspect AC adapter and power cord for physical damage, bent middle ID pin. 4. Plug in AC adapter and power the computer without battery. AC adapter issue 77

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Table 6-10
Issues, possible causes, and fixes
(continued)
Items
Procedures
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
(
11. Test with minimum
configuration
on page
70
)
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.
AC adapter issue
Use this information to troubleshoot AC adapter issues.
Table 6-11
Issues, possible causes, and fixes
Solution
Symptoms
●
No sign of power
●
No boot
●
No rear power light
●
No front power light
●
Battery does not charge when AC
adapter is connected
Possible causes
AC adapter and others (for example, external power source).
Troubleshooting steps
Quick check
1.
Verify external power source (
2. Examine the environment
on page
61
).
2.
Remove all external devices, including docking station.
3.
Perform a hard reset for the computer (
8. Hard reset
on page
68
).
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
HP Smart Adapter
warning message
on page
90
for further information.
Verify AC adapter
1.
Remove working battery.
2.
Verify that AC adapter is compatible with product. Verify that part number is for
this computer if possible.
3.
Inspect AC adapter and power cord for physical damage, bent middle ID pin.
4.
Plug in AC adapter and power the computer without battery.
AC adapter issue
77