Why wont my tv turn on ?

TV may be on the wrong input and that will give you a blue screen. When you turn the TV on and the screen starts lighting up it should show on the screen what input the tv is on. If it is not on correct input change input with the TV remote or buttons on the tv. If it is on the correct input try a power cycle on the cable box, just unplug the cable box power cord for a few seconds and then plug it back in. If neither of these solve the problem describe how the cable box is connected to the tv.

try a universal remote. maybe the original remote is dead.

https://us.en.kb.sony.com/app/answers/list/kw/wont%20respond%20to%20the%20remote/p/61659,63345,63402/c/65,66/
here you can se if any situation is your alike.

Check the remote control for its infrared emission. Check this link and select the site 'Electro-help' for details. Detailed description is there, about how to check and repair a remote control. Pull up older posts.

Try website like Remotes.com to buy an original or very close to the original remote.

I know i gave you the right solution. Can you please tel me why you got the money refunded?

my remote is not responding to new battery not showing green light.

take your tv to technician who can check your power supply, if your power is coming on and off, than a problem is not as big. firstly let him check a ht of a supply constantly, your supply is cutting.

Lg lcd tv remote codeTRY ANY OF THESE: 140, 024, 040, 098,043, 259,260, 261

try pressing one of the number keys instead of the power button on the remote