[dragonser]

Hi,
the ic I was wondering about was the Ic used to generate the sound and vision rf signals, which would be in the metal case...
if it uses the MC44cc373 ic ( it may not do ) , there is also a Sony ic CXA1929m that might do the similar thing... then the datasheet for the MC44cc373 says there is a test mode.. two white vertical bars and a 1 khz tone...
these ic's are controlled by an i2c bus which would be provided by the ic's you have taken a picture of...
This means that there is no easy way of knowing ( as far as I can tell ) what buttons need to be pressed to switch out of the test pattern mode...