Solder joints on the motherboard can break due to heat expansion and physical stress, causing an intermittent or complete loss of power delivery. The device only turns on when running on battery, not when plugged in.
Diagnosing No Power After Full Charge in HP Laptops
For users without experience, attempting this repair risks causing further damage. A visual inspection might reveal no physical damage, but internally the connection could be broken, resulting in insufficient power being delivered to the system.
If the multimeter shows zero volts or a significantly lower voltage than the rating on the adapter, the adapter needs replacement. A degraded battery can sometimes cause a safety lockout, making the system believe there is no valid power source to boot from.
Diagnosing No Power After Full Charge in HP Laptops
Signs of a Failing Battery Physical swelling or bulging of the battery casing. This specific symptom indicates that the device is receiving power, but the hardware or firmware is failing to initialize the startup process.
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