Daewoo 19NF

[samtam]

I have a monitor which seems to be missing red, This condition is present regardless of what is on the screen (desktop, MPG, application)
Is there anything I can adjust to try and bring the red back into the picture.
I am not a 'tech' but have (many years ago) formal electronics training, so laymens terms would be the ticket for me.
Any help is appreciated... it's either give this a shot or just throw the damned thing out... thought I would try to fix it first.
I have searched the forum and the database for a service manual with no luck for this make and model.
Also, i have removed the cover and the RF sheild and found 4 small white (what look to me like) adjustment pots marked 'YH', 'YHC' 'YVS' 'G/D'. Would this be the place to start?
Thanks