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HP Elitebook 8460p sound suddenly stopped working after rewinding video backwards

HP Recommended
Elitebook 8460p
Microsoft Windows 7 (64-bit)


I was watching video using media player MPC-HC.1.7.13.x64 

MPC-HC (64-bit)

Build information:
Version: 1.7.13 (e37826845)
Compiler: MSVC v19.00.24215.01
Build date: Jul 16 2017 18:47:17

LAV Filters:
LAV Splitter:
LAV Video:
LAV Audio:
FFmpeg compiler: MinGW-w64 GCC 7.1.0

Operating system:
Name: Windows NT 6.1 (build 7601, Service Pack 1)
Version: 6.1 (64-bit)

CPU: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz
GPU: Intel(R) HD Graphics 3000 (driver version:


In the input for headphones I had plugged in Koss Pro 4AAT headphones.

I rewinded the video backwards by 5 seconds using the left arrow key on the keyboard on laptop. A stronger crack was heard in the headphones. The video rewinded it self backwards with short lag (like 1 second) and started playing as expected. But there was no sound anymore.


I unplugged the headphones out of the jack. The laptop did not identify unpluging the headphones from the output jack and did not start playing the sound from the built-in speaker of the laptop.


Restart of the OS did not help.

I tested using different headphones pluging into the jack of the laptop - no sound.

I tested pairing the laptop with bluetooth speaker using the bluetooth of the laptop - sound worked.

After unpairing the bluetooth speaker with the laptop - no sound.

When I plugged some other devices able to play the sound of the laptop to headphones output of the laptop I heard two cracks and weak whistle inbetween, but no sound, only hearable buzz. It goes like this: crack, whistle, crack and constant buzz (while slowly pluging in the jack of the device into the laptop output). The same is happening while unpluging the device. 



Solution: Turning off the laptop completely.

* Unpluged the AC source,

* removed all devices connected to the laptop,

* removed the battery of the laptop,

* waited for couple of seconds

* pluged in the battery back,

* started laptop and the sound was working again.

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