My ancient but hardy Samsung 1080 SP42Q2HL rear projection tv has suddenly split it's colours. When I press "self focus" I get the error message check factory data. I have had a look at the advice on the forum and I have tried to adjust convergence manually from the guide in the users manual but the option of manual convergence isn't available. My tv goes, time, plug and play, language, self focus, blue screen, more>, melody, AV set up.
I am wondering if it would be
a) worth buying a service manual,
b) more of a problem than just adjusting the convergence