HP ZBook Studio x360 Maintenance and Service Guide - Page 107

AC adapter issue, Battery not recognized, not charging, Solution, Quick check, Verify AC adapter

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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 78). 2. Remove all external devices, including docking station. 3. Perform a hard reset for the computer (8. Hard reset on page 86). 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 109 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 84). 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. Battery not recognized, not charging Items Symptoms ● No battery status light ● Blinking amber (critically low battery level) ● No boot without AC adapter Procedures Possible causes Defective AC adapter and/or battery. NOTE: Before proceeding, verify that the computer can boot to BIOS or Windows with a good AC adapter. Troubleshooting steps Common issues and possible solutions 95

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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
78
).
2.
Remove all external devices, including docking station.
3.
Perform a hard reset for the computer (
8. Hard reset
on page
86
).
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
109
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
84
). 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.
Battery not recognized, not charging
Items
Procedures
Symptoms
●
No battery status light
●
Blinking amber (critically low
battery level)
●
No boot without AC adapter
Possible causes
Defective AC adapter and/or battery.
NOTE:
Before proceeding, verify that the computer can boot to BIOS or Windows with a
good AC adapter.
Troubleshooting steps
Common issues and possible solutions
95