Built for 6th Gen Intel Core (Skylake) and Xeon processors.
[DC-In Jack / Battery] ---> [VIN / DC-IN Rail (19.5V)] | [3.3V/5V Standby PWM] | +--------------------+--------------------+ | | | [3.3V_ALW] [5V_ALW] [1.35V_DDR] | | | (EC/BIOS) (USB/SATA) (RAM Power) | | +---------> [CPU Core VCC / System Rails] Primary Power Rails
is designed around the platform, supporting high-speed DDR4 memory. Key hardware specifications found within this architecture include: Processor Support: Up to 11th Gen Intel Core i7 processors. apw70 lac391p schematic portable
The APW70 board is driven by an MCU (commonly an STC 15-series or ATMEL AVR in older designs).
The schematic marks the entry point of the line right next to the DC-in jack. Built for 6th Gen Intel Core (Skylake) and Xeon processors
Use an oscilloscope to check for data activity on pin 2 (Data Out) and pin 5 (Data In) of the BIOS chip during the first 3 seconds of power-up. If there is no pulse activity, desolder the BIOS chip and re-flash it with a verified clean ME-region dump tailored specifically to the LA-C391P motherboard revision. 5. Vital Voltage and Resistance Reference Table
: The primary DC voltage distributed across the board when the AC adapter is connected. The APW70 board is driven by an MCU
Verify the DC-in MOSFETs (usually configured as a dual-MOSFET safety switch) are opening properly. The charging IC (often an ISL or Texas Instruments BQ series chip) must generate an ACIN signal to indicate valid adapter power. Always-On Rails (Standby Power)
HP ZBook 17 G3 APW70 LA-C391P REV 1B BIOS Dump - Free Download and Full Access - Indiafix. HP ZBook 17 G3 BIOS fix needed. Mainboard LA-C391P Rev. 1C
: On the LA-C391P, the code PU302 typically refers to a Power IC; troubleshooting often involves checking if the surrounding capacitors are shorted to ground. HP ZBook 17 G3 APW70 LA-C391P REV 1B BIOS Dump