Hi
Have you looked inside yet?
When looking inside I would keep an eye on any capacitors that look expanded or look dodgy as they would probably be the issue as a lot of the time they are responsible for powering these sorts of systems
If you are unsure or can’t find any issues upload some photos of the inside using this really nice guide!
[guide|21499|new_window=true]
Also if you turn it back down does it start working again or does it have to be turned off fully?
Hopefully this helps
Any questions please ask
Thanks:-)