Volume rocker gone rogue!

[DontUnderstandMyIpad]

For some reason does my volume rocker misbehave. It works fine for a while, but at some point it won't turn up the volume anymore, only down, so the iPad ends up being muted. The volume icon still shows in the center of the screen when pressing the up button, but had no effect.

This has occurred multiple times with restarts in-between.

Has anyone else come across this issue? Might it be an iOS fault, or a broken volume button?
iPad 2 4.3.1.

 

[DontUnderstandMyIpad]

Sorry for double post, but I cannot add images when editing a post.

Anyway, for some reason does the volume disappear completely, as shown below where the ball indicating system volume is gone.

 

[DontUnderstandMyIpad]

Found the solution.

The sound was getting transmitted via the HDMI cable to a screen whose speakers where turned off. The OS somehow overrides AirPlay and just sends the audio via HDMI, unless changed back every time the HDMI cable is connected.

 

[twerppoet]

Good to know. I might get one of those cables eventually.