Black screen but sounds ok

[n.kithinji23]

What do I do my LG tv 32LN5100 has a black screen but the sound is ok but when I use a flash light can see pictures.

 

[WyomingKnott]

Using a flashlight was pretty interesting. Sounds like your backlight is not working, but as for what to do, I would take it into a shop. Too many reasons this could happen, from a loose cable to a destroyed backlight panel to - just about anything. Sorry.