Check the high-side MOSFETs connected to the phase coils. If a high-side MOSFET shorts out, it can bypass the regulator and shoot 19V directly into low-voltage components, which often destroys the CPU.
At first glance, the LA-E801P looks like a standard two-board solution (often combined power and inverter/LED driver). When you open up the schematic, you can immediately segment the board into three distinct neighborhoods:
Technicians frequently encounter specific component failures on this particular board revision:
Locate the "Power Block Diagram" page (usually page 2 or 3 of the Compal schematic). Follow the arrows to trace which voltage rail enables the next. For instance, if +3VALW is missing, check the inputs and enable pins of the 3V PWM regulator chip using the schematic pinout map.
: 30-pin or 40-pin eDP (embedded DisplayPort) connector supporting Full HD (1920x1080) touch panels.
Powers USB ports, 5V secondary switches, and provides the drive voltage for various gate drivers. 3. Secondary and Run Rails
Support for M.2 NVMe/SATA SSDs alongside a standard SATA 2.5-inch drive interface.
