The device was getting hot while on the charger.The complaint device was returned for evaluation.Incoming visual inspection found no anomalies.The device has no evidence of physical or cosmetic defects.Technical evaluation identified a main board circuit failure causing the unit to have low sounding crystals.The device was tested for over 24 hours with no evidence or findings of overheating.A parameter test was preformed and all tests passed.The customer complaint was confirmed as a main board failure was identified during device evaluation; however, the reported issue is not related to the device malfunction identified.The root cause for the main board failure was determined to be an integrated circuit failure resulting in weak sounds.A definitive root cause for the reported event could not be determined as a there was no evidence or findings related to the device overheating.The main board circuit was repaired and the device passed the ultrasound transducer electrical check.The device was repaired and returned to the customer.No further investigation is required.
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