Table 7-11 Issues, possible causes, and xes (continued)
Solution
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 112). 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 The HP Smart AC adapter has a special pin in the middle, called the ID pin, for power
rating and throttling. If this pin is broken, the rear power light turns on, but the power
button and front power lights blink continuously, and the computer does not turn on.
Third-party AC adapters do not work with the computer.
Use the AC adapter that came with the computer for better performance.
Battery not recognized, not charging
Use this information to troubleshoot battery issues.
Table
7-12 Issues, possible causes, and xes
Items Procedures
Symptoms
● No battery status light
● Blinking amber (critically low
battery level)
● No boot without AC adapter
Possible causes
Defective AC adapter , battery, or both.
NOTE: Before proceeding, verify that the computer can boot to BIOS or Windows with a good
AC adapter.
128 Chapter 7 Troubleshooting guide ENWW
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