Hi
Following problem regarding a Quest 2 I got with broken USB port and "not turning on".
After replacing the USB/Audio port + cable the Device still refuses to turn on. A USB multimeter is showing a pulsing amp draw ranging from 70 mA to 1.2 A and back.
All obvious caps measured good (no short).
A visual thermal inspection showed two ICs glowing up also pulsing.
One was a Qualcomm PMIC PM8150B which I suspected to be the culprit. But replacing it with a china-replacement made no difference.
The other one I can't identify. It looks like a tiny BGA with marking "HEBV BCD". It also seems to be related to the battery charging circuit. Does anyone know this part?
Has anybody another hint as what I should look for further?
Following problem regarding a Quest 2 I got with broken USB port and "not turning on".
After replacing the USB/Audio port + cable the Device still refuses to turn on. A USB multimeter is showing a pulsing amp draw ranging from 70 mA to 1.2 A and back.
All obvious caps measured good (no short).
A visual thermal inspection showed two ICs glowing up also pulsing.
One was a Qualcomm PMIC PM8150B which I suspected to be the culprit. But replacing it with a china-replacement made no difference.
The other one I can't identify. It looks like a tiny BGA with marking "HEBV BCD". It also seems to be related to the battery charging circuit. Does anyone know this part?
Has anybody another hint as what I should look for further?