Required to identify damaged, burned, or bridged microscopic capacitors and resistors.
: A common failure point is the PQA1 chip (PE642DT dual transistor), which often causes "no power" or "no lights" symptoms.
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
: Information on the battery charging IC and the DC-in negotiation (USB-C Power Delivery). Memory : Wiring for integrated LPDDR3 RAM. la-e801p rev 2.0 schematic
Attempting component-level repair on an LA-E801P requires a multimeter, a DC power supply, and a soldering station with a fine tip or hot air gun. Always disconnect the battery and CMOS battery before probing the board to prevent accidental shorts. If you'd like, I can help you dig deeper if you tell me:
Managed by a multi-phase PWM controller (such as an Intersil/Renesas or Richtek IC) driving high-side and low-side MOSFETs.
: Supports 6th and 7th Gen Intel Core processors (Kaby Lake/Skylake-U). Required to identify damaged, burned, or bridged microscopic
VIN passes through the entry protection MOSFETs.
Before diving into the schematic, you must understand the voltage sequence. The LA-E801P typically utilizes several primary power rails:
[19V DC-IN] ──> [VIN (19V)] ──> [+3VALW / +5VALW] ──> [EC KB9022 Powers On] │ [CPU Core Rails] <── [RAM Power (+1.2V)] <── [Power Button Pressed (EC_ON)] │ [PLT_RST# Released] ──> [BIOS Code Execution] ──> [System POST / Video Out] Troubleshooting Context is frequently found in laptops and
Diagnosing a dead LA-E801P board requires tracing the power distribution from the DC jack down to the low-voltage logic gates. The schematic divides these into specific states: (Mechanical Off), S5 (Soft Off), S3 (Sleep), and S0 (Fully Operational).
hosts a document labeled as LA-E801P, though it is often the earlier revision. Archives & Communities: Telegram Repositories: Large schematic archives like Schematics|Boardviews| ARCHIVE files for the Repair Forums: Technical discussions on sites like