LG Rear projection wont start

I have a LG rear projection TV Model number: rt-54na61rb . Every now and then when you turn it on nothing comes on screen and a chirping sound is heard for a few seconds and then stops. (The chirping sounds as if something is trying to kick in but cant. Kind of like when a cars starter engine goes and it’s hard to get the car started) If you press any of the channel or av buttons the same chirping starts again for a few seconds. If you turn it off and try to start it again it does the same thing. I have found if you leave it off for a while it will eventually work but the duration of waiting before it works seems to be getting longer and longer with each time this error occurs. I can now wait days before it sometimes starts up. Does anyone know if this is a simple fix like cleaning out a filter or resoldering a loose connection or something like that or is it a big problem that’s not worth fixing..