LG RE44SZ21RD

[brainstorm]

Hi,
I have in for repair a LG DLP set model RE44SZ21Rd which I know isn't LCD TV but I
wondered if anyone out there has had this fault which is intermittent colour noise on the picture,
although I say it is intermittent it is in actual fact "in fault" most of the time. The fault is even on Teletext which makes me think it isnt a "chroma" fault. Any help from anyone with expoerience with this type of set would be appreciated.(see attached pic)