See exactly which signal triggers the next step in the boot process.
Identify burnt resistors or capacitors that have lost their markings. lah103p schematic new
Which (e.g., is 19V present?). If you have a multimeter or oscilloscope handy. AI responses may include mistakes. Learn more See exactly which signal triggers the next step
Check the two DC-in MOSFETs near the charging port. They often short, preventing the 19V rail from reaching the rest of the board. lah103p schematic new
On versions with USB-C charging, the controller IC can fail due to surges. How to Use the Schematic with a Boardview
If you have just downloaded the schematic, focus your troubleshooting on these common failure points: