Basically I have the HLN567W model which i purchased in 2004. I've changed the color wheel and the lamp once. Now, the TV is having a problem where if its cold and i turn it on, it'll go on for 5 minutes and shut off, and for the next 3-5 times turning it back on it shuts off until it comes to a point where it'll stay on and runs good! What part would i have to change to make this baby work like its supposed to?