Chassis board does not output green colour. Sega Rally twin.

[OldFoo]

Hi lads!



I have a Sega Rally twin with Sega/Sanwa PM1745 monitor chassis, however one of the monitors does not output green colour.



Games work fine as I have switched the chassis boards and the problem moves with the chassis.



As far as I can troubleshoot the RGB transisters work. I have resoldered all joints.



Last time I powered it up and went into the test menu the green colour worked for about 10 seconds and then disappeared.



Any ideas? Sorry about the grammar as I am from Sweden.



Best Regards

Martin

[OldFoo]

Solved it! The video amplifier chip labelled IC101 is to blame. Might help someone else having this problem