Any specific you have gathered so far on the power pins.
The KB926QF belongs to the ENE family of KBC (Keyboard Controller) / Super I/O controllers. It is designed to bridge the gap between low-level hardware components (keyboard, thermal sensors, fans) and the main chipset (Southbridge/PCH or SoC). ENE Technology Inc. Package Type: QFP128 (Quad Flat Package with 128 pins).
The KB926QF is typically packaged in a 128-pin LQFP (Low-profile Quad Flat Package). To troubleshoot a motherboard using this chip, you need to check specific voltage rails and signal lines. Critical Pins for Troubleshooting Pin Number Signal Name Description Expected Voltage VCC / +3VPCU Main power supply for the IC. 3.3V (Always present) Pin 19 NBSWON# Power button trigger input. Drops from 3.3V to 0V when pressed. Pin 32 ALW_ON / S5_ON Signal to turn on 3.3V/5V rails. 3.3V after power button press. Pin 127 LID_SW# Lid switch sensor input. 3.3V (High means lid is open). Pin 128 EC_RST# Reset signal for the controller. 3.3V (Must be stable). kb926qf datasheet
Pay close attention to the suffix extensions (e.g., KB926QF D3 vs. KB926QF CO ). In many laptop motherboards (like Quanta or Compal layouts), revisions are not interchangeable. Always replace with the exact matching revision version to avoid power sequencing errors.
), which is vital for maintaining the stability of sensitive analog and digital circuits. Power Efficiency Any specific you have gathered so far on the power pins
: The chip functions efficiently as a Low Dropout (LDO) regulator for low-power electronics. It is noted for its high output voltage accuracy (typically ±1% tolerance
If you suspect this chip is dead, follow this step-by-step diagnostic guide using a multimeter in DC voltage mode: ENE Technology Inc
handles critical low-level tasks that must run even when the main CPU is powered down:
When sourcing a replacement part through hardware suppliers such as Jotrin Electronics or online marketplaces, matching the precise chip stepping suffix is highly recommended. ENE produced several historical iterations of this IC: 1 pcs New KB926QF D1 KB926QF DI ENE TQFP-128 IC Chip