Motherboard · critical

How to fixLPC-BUS-HANG

Sensor bus (LPC) freeze

What this error means

Sensor bus (LPC) freeze (LPC-BUS-HANG) is a critical-severity fault affecting the motherboard. The sensor bus for temperature monitoring and fan control stopped responding. The usual suspects are dead battery CR2032, short circuit on the motherboard, aborted BIOS update process and age of capacitors. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Replace the CMOS battery on the motherboard

Replace the CMOS battery on the motherboard.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

I need help
02Use the USB BIOS Flashback function (if the board has a button)

Use the USB BIOS Flashback function (if the board has a button).

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

I need help
03Check the rear I/O panel for a short

Check the rear I/O panel for a short.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

I need help

Possible causes

  • Dead battery CR2032
  • Short circuit on the motherboard
  • Aborted BIOS update process
  • Age of capacitors