Mitsubishi WS-65513 main tuner and composite video black and white

Hello, I have a WS-65513 that recently started displaying only the primary tuner and the composite video inputs (1,2,3) in Black and white.

All menu's, and digital inputs (DTV ant and component inputs work great.

Th epicture quality is great on all inputs, just missing color on the ones above.

Any ideas where to start??

Thanks