Capture the pattern
Note error messages, warning lights and when the issue occurs, including whether it happens on battery power or while connected to a charger. Repeatable observations can help guide assessment.
Do not assume the cause
Slow performance, shutdowns and charging faults can each have several possible explanations. Testing is more reliable than replacing components based on one symptom.
Pause if risk increases
If the device overheats, has liquid exposure or repeatedly loses power, stop using it when safe and request an assessment rather than continuing to test it.
This article provides general information, not a diagnosis. Recommendations depend on the device and the specific symptoms.
Discuss a device issue