I have an issue with this board, apparently it fell off the table on the charging port while still connected to the charger. Customer replaced the charge port with cable and whole connector, yet the board still won't charge the battery or work on adapter power. Laptop works fine on charged battery (with or without adapter connected). When Laptop is connected to the adapter and I take out the battery, it actually switches to the adapter power and continues to work for about 2 seconds then shuts off and stays dead until I insert a battery again.
Adapter is not the issue there. It behaves the same way on my laboratory power supply. No current draw at all.
Connector center pin shows 1V when connected to the adapter.
3.3V and 5V coils are working when connected to adapter, there is power to the on button.
BQ737 was replaced with known good part
ACDET to this IC measures 2.8V, it has 19V power.
Passives around it seem right, although I don't know their design values.
Measured a bunch of mosfets, none of them seem to have shorts.
Having no schematic for this board makes it difficult to troubleshoot. Did somebody come across a similar issue?
Adapter is not the issue there. It behaves the same way on my laboratory power supply. No current draw at all.
Connector center pin shows 1V when connected to the adapter.
3.3V and 5V coils are working when connected to adapter, there is power to the on button.
BQ737 was replaced with known good part
ACDET to this IC measures 2.8V, it has 19V power.
Passives around it seem right, although I don't know their design values.
Measured a bunch of mosfets, none of them seem to have shorts.
Having no schematic for this board makes it difficult to troubleshoot. Did somebody come across a similar issue?
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