HP ZBook Studio G3 Maintenance and Service Guide - Page 99

AC adapter issue, essential hardware, Solution, Quick check, Verify AC adapter, Tips and tricks

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Page 99 highlights

2. Perform visual check for loose connections, bent pins, stray wires, dust, nearly faulty parts (bulging/leaking capacitor). 3. Test essential hardware configuration (11. Test with minimum configuration on page 78) 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 Symptoms ● No sign of power ● No boot ● No rear power light ● No front power light ● Battery does not charge when AC adapter is connected Tips and tricks Solution Possible causes AC adapter and others (i.e., external power source) Troubleshooting steps Quick check 1. Verify external power source (2. Examine the environment on page 66). 2. Remove all external devices, including docking station. 3. Perform a hard reset for the computer (8. Hard reset on page 76). 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 99 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. 5. Inspect the power port on computer side for any damage, dust, debris. 6. Check power light (7. Status lights, blinking light codes, troubleshooting lights, and POST error messages on page 72). Rear power light indicates that external power to the computer is good. 7. If there is still no rear power light or no boot, replace the AC adapter. The HP Smart AC adapter has a special pin in the middle, called the ID pin, for power rating and throttling purpose. If this pin is broken, the rear power light will be on but the power button and front power lights will blink continuously and the computer will not turn on. Third party AC adapter will not work on the computer. Use the AC adapter that came with the computer for better performance. See HP Notebook PCs - Testing and Using the AC Power Adapter Common issues and possible solutions 85

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2.
Perform visual check for loose connections, bent pins, stray wires, dust, nearly faulty parts
(bulging/leaking capacitor).
3.
Test
essential hardware
configuration
(
11. Test with minimum
configuration
on page
78
)
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
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 (i.e., external power source)
Troubleshooting steps
Quick check
1.
Verify external power source (
2. Examine the environment
on page
66
).
2.
Remove all external devices, including docking station.
3.
Perform a hard reset for the computer (
8. Hard reset
on page
76
).
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
99
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.
5.
Inspect the power port on computer side for any damage, dust, debris.
6.
Check power light (
7. Status lights, blinking light codes, troubleshooting lights,
and POST error messages
on page
72
). Rear power light indicates that external
power to the computer is good.
7.
If there is still no rear power light or no boot, replace the AC adapter.
Tips and tricks
The HP Smart AC adapter has a special pin in the middle, called the ID pin, for power
rating and throttling purpose. If this pin is broken, the rear power light will be on but
the power button and front power lights will blink continuously and the computer will
not turn on. Third party AC adapter will not work on the computer.
Use the AC adapter that came with the computer for better performance.
See
HP Notebook PCs - Testing and Using the AC Power Adapter
Common issues and possible solutions
85