Christ, why did you disturb the bias settings? Which stupid @#$% told you to that? The red color was most likely a blown Red Output Transistor, or something as simple as a bad CRT base. Now, I suggest that you switch off the TV, wait for a couple of hours, open the set, and very slowly and carefully pull the CRT PCB (along with sockets base. Then clean the CRT terminals (use a fine emery sheet.) Also check the base for dry (cold) solders. Replace the CRT board. Picture should be normal. If problem persits, then it is definitely the Red Output Transistor or associated components. Get a professional to have a look.
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