Tv problem. I have a mitsubishi tv..ck 31302. i have owned this tv for several years. i took it

Question

I have a mitsubishi tv..ck 31302. i have owned this tv for several years. i took it out of service 4 years ago due i bought a 65 inch big screen. when i put it away it was working fine. i pulled it out to use it in my daughters room and all i get when i turn it on is a blue line across the middle. thanks for help.