When troubleshooting a dead board, verifying the power sequence is the first step. Below are the primary voltage rails found in the LA-C781P schematic: The main 19.5V power line from the DC jack.
Often the BQ24770. If this fails, the battery won't charge or the system won't detect the AC adapter.
If the standby voltages are missing, this IC or its surrounding capacitors are likely culprits.
When troubleshooting a dead board, verifying the power sequence is the first step. Below are the primary voltage rails found in the LA-C781P schematic: The main 19.5V power line from the DC jack.
Often the BQ24770. If this fails, the battery won't charge or the system won't detect the AC adapter.
If the standby voltages are missing, this IC or its surrounding capacitors are likely culprits.
