The LA-E801P motherboard typically features an integrated System-on-Chip (SoC) architecture, combining the CPU, GPU (in UMA configurations), and Platform Controller Hub (PCH) into a single package. Core Hardware Specifications
Ensure the EC chip is receiving its stable +3V_EC voltage supply line. Clock: Confirm the RTC crystal oscillator is actively oscillating.
Compal LA-E801P Rev 2.0 (also known by codenames ) is a motherboard found in the series and laptops. This board typically supports Intel 6th (Skylake-U) 7th (Kaby Lake-U) Generation processors and features discrete AMD Radeon graphics or integrated Intel graphics. HP Support Community Core Technical Specifications : Intel Kaby Lake/Skylake-U 15W. : Dual-channel DDR4-2133MHz SO-DIMM, operating at 1.2V. : Options include integrated Intel HD Graphics or discrete AMD Radeon R5/R7 : SATA interface and support for M.2 SSDs (PCIe/SATA). Networking
Measure voltage on Pin 8 of the BIOS chip ( +3V ). Hook up an oscilloscope to Pin 1 (CS#) or Pin 2 (DO) to see if data transmission occurs during boot. If data is flatlining, use an EEPROM programmer to flash a clean, verified BIOS dump containing a cleared ME Region matching the motherboard's clean firmware profile. 5. Schematic Reading Tips for the LA-E801P
The official LA-E801P schematic is a proprietary document, but it is widely available online through dedicated laptop repair communities. la-e801p rev 2.0 schematic
Auxiliary programmable voltage for the SoC/PCH logic.
The power adapter’s LED blinks or shuts off entirely when plugged into the laptop. The laptop shows no signs of life.
: Provides a preview and full document for the LA-E801P board.
The LA-E801P Rev 2.0 motherboard integrates essential computing blocks into a highly efficient layout designed to minimize trace lengths: Compal LA-E801P Rev 2
Once all voltage regulators report stable operation via their respective outputs, a global ALL_SYS_PWRGD signal is generated. The system removes the reset lock ( PLTRST# ), allowing the CPU to begin executing code from the BIOS chip. 4. Common Failure Modes and Troubleshooting
Because budget motherboards like the LA-E801P lack printed component labels (silkscreen notation) directly on the circuit board, a schematic alone is difficult to navigate. Pairing the PDF schematic with an interactive boardview file inside a viewer like OpenBoardView allows you to click an unlabelled component pad, trace it back to its logic schematic diagram, and immediately identify what component needs to be replaced. Professional Repair Strategy
The laptop may turn on with a spinning fan but display no video, or experience delayed boot times. Re-flashing the BIOS with a clean Intel ME (Management Engine) region often fixes this.
: Typically uses chips like the BQ series to manage 19V input and battery charging. : Dual-channel DDR4-2133MHz SO-DIMM, operating at 1
Beyond the physical diagram, the software known as the is inextricably linked to the LA-E801P Rev 2.0 motherboard. These binary files contain low-level instructions that initialize the hardware before the operating system loads.
Before connecting any power, configure your digital multimeter to (or Continuity Mode). Measure the resistance relative to the system ground at the large physical inductors (coils) across the board:
The main schematic is typically provided in PDF format , which can be opened with any standard PDF reader like Adobe Acrobat. A Boardview file is different; it comes in formats like .CAD , .ASC , or .BRD . You will need specific boardview software, such as OpenBoardView (free) or BoardViewer , which are widely available for download on major repair forums.
The Compal LA-E801P Rev 2.0 is a robust but highly complex multi-layer PCB. While failures in the power management ICs or shorted ceramic capacitors are common, they are entirely repairable with patience, proper diagnostic tools, and the correct schematic files. Always ensure you are cross-referencing your physical board measurements with the specific Rev 2.0 documentation, as component numbering (designators like PR, PC, PQ, or PL) can vary significantly between different engineering revisions.