When the AC adapter is plugged in, 19V enters the DC jack and passes through an EMI filter stage consisting of inductors and capacitors. It encounters two N-channel protection MOSFETs controlled by the charging IC ( ISL88739B ).
: A common failure point identified in community repairs is the PQA1 chip (a dual transistor like the PE642DT), which can cause low resistance and prevent the board from powering on.
: He probed the drain of the first MOSFET. Zero volts. la-e801p rev 2.0 schematic
A: No. The LA-E802P is for the Dell 15-3558 series. While similar, the power distribution and EC pins differ. Using the wrong schematic will mislead you.
confirm that finding Rev 2.0 specifically is a common hurdle for HP laptop repairs. Troubleshooting Context is frequently found in laptops and is associated with common power issues: No Power / No Lights: Often linked to the 19V rail failing at the first Mosfet. Graphic Conversions: Some guides detail converting the When the AC adapter is plugged in, 19V
: Look at the display cable pins on the board.
If your DC adapter light turns off as soon as you plug it into the laptop, you have a on the main power rail. : He probed the drain of the first MOSFET
The LA-E801P Rev 2.0 schematic is an essential document for laptop technicians and electronics hobbyists tasked with repairing the HP 15-BS and similar series laptops. This motherboard, often featuring Intel Kaby Lake processors, uses a complex design requiring detailed diagnostic maps to pinpoint issues like no-power, no-display, or charging failures.