La-e801p Rev 2.0 Schematic

Controlled by a dual-channel step-down PWM controller (often a variant like the SY8286 or similar RT-series controller), these rails must be present immediately after connecting the power adapter, even before pressing the power button.

Check the input protection stage. Measure the resistance to ground on the main B+ rail directly after the current-sensing resistor. A low resistance reading (below 10 Ohms) indicates a short circuit, usually caused by a ceramic filtering capacitor or an upper-phase buck MOSFET breaking down into a short. Power LED Blinks, but No Boot

Provides an interactive 3D virtual layout of physical traces and pin pads.

If the board turns on, check if DRAMRST (DRAM Reset) is high. Lack of DRAMRST often points to a failure in the power-good signal sequence from the RAM IC (G5616B). la-e801p rev 2.0 schematic

The schematic refers to the Compal CSL50/CSL52 motherboard, primarily used in HP 15-BS and HP 250 G6 series laptops. Finding a direct "full text" transcript is rare as these are proprietary PDF documents, but key technical details and community troubleshooting for this specific revision are widely documented. Core System Architecture Platform : Intel Kaby Lake-U (7th Gen Core processors).

The LA-E801P is a highly integrated motherboard built around an Intel platform, typically supporting 7th and 8th Generation Intel Core processors (Kaby Lake and Kaby Lake-R architectures) soldered directly to the board (BGA package). Key System Architecture:

The first few pages of the Compal schematic feature a comprehensive system block diagram. Use this to quickly trace which bus connects components together (e.g., the embedded controller's connection to the BIOS and SMBus lines). Controlled by a dual-channel step-down PWM controller (often

: Supports Dual Channel DDR4 SO-DIMM (1.2V) up to 2133MHz.

Repair logs from forums like Badcaps.net, Vlab, and DIY-LaptopRepair reveal specific weak points on this motherboard:

: Technicians often report low resistance on the source side of the first MOSFET (PQB1) or the PQA1 chip, even when the MOSFET itself tests fine. A low resistance reading (below 10 Ohms) indicates

screen backlighting power protection fuse near the display port to see if it blew during hot-plugging. Sourcing Document Downloads Safely schematics|boardviews| ARCHIVE – Telegram

Integrated Intel U-LV CPU (BGA package) handling both processing and Platform Controller Hub (PCH) operations.

: The primary 19V line enters through the DC jack and passes through protection MOSFETs. A known troubleshooting point involves the transistor and the