Dvd Problem!

[bleek]

Hey guys i got a 2008 es350 with ML sound system, i've been watching dvd's for 6 months and all of a sudden i get a picture but no sound! I've used a laser lens cleaner on it and still nothing.

It seems to work fine when i first get in the car, but as soon as it gets warmed up the sound cuts out. I get sound on cd's no problem but no sound from dvd's only pictures. I get volume fine from the radio and everything else, any suggestions guys? Works great when you first start the car but as soon as she warms up the dvd sound cuts right out.