SANYO VCR/DVD player model DVW-7200?

We changed the TV that our player was hooked up to and every time we try to turn it on and watch a dvd or vcr, the machine will stay on for a few seconds and then it turns off on its on.It will not play either one and I can't find the manual.If anyone could please help me with this I would appreciate it and also my husband has no idea if he is hooking the red,yellow and white into the right ones.Thanks