| Electronics > Repair |
| help laptop motherboard thomson NEO14A-4sl64 |
| (1/1) |
| mabar:
Hello, The motherboard has undergone a polarity inversion. This short-circuited the 100µF tantalum. After replacement, the A7SHB mosfet burned. After replacement, everything works except the battery charge. I made the partial diagram of the motherboard around the charging chip. I took the voltages around the BQ735 chip, see photos. I don't see anything abnormal on the voltages except ACDRV which is not boosted, I have 6.6v instead of ~18V normally? I suspect a chip defect? Here is my question: but I also have a connection between Q1 and Q2 which goes to mosfets can they intervene in blocking the charge? thank you |
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