I have an LG Flatron 32" from 2004
One day I lost the color, since then works great in Black/White only.
Same for all inputs antenna/dvd etc

I opened it, kicked the components a bit to discover any bad contacts, no fix.

I guess it might be a color decoder that has problems.

Any suggestions for a quick fix, or is it not worth fixing it ?

Any help is appreciated.

Thank you.

It's probably worth repairing. If the picture is good in all other aspects except color it can't be a major failure, since gray is made by mixing all the colors equally.

First thing, grab a hold of a service manual (search by chassis number, it's usually printed on the back label or inside, on the chassis itself), http://eserviceinfo.com/ is a good source of free manuals. Then get your multimeter out and start measuring. ;) The service menu codes would probably be helpful as well, see if you can find those out.