My G70 have been serving me well and all of the sudden the red colour become expose out of other colour. It mean it used to be a thin line and now become very thick. When I go to the MG focus I try to focus all and it from round flare it become 1 straight. No longer round anymore. It seem the the round flare and core disappear. Is the the focus board problem or convergence board. Only Red colour. Appr 3000 hrs non tube and chassis. Tube condition 8/10. Please advise.