I can't tell what model the TV is but let's hope it's not some old RPTV. Share a link to the real TV model and if over 10 years old, get repair estimates.
As to the bulb, it shouldn't be bulb related but those color wheels or mainboard. Since I don't have a model number I can't guess. And even if I knew the model, it's still a guess. My stance on over 10 year old sets is to get estimates. Often you can't get the repair folk to give you a price.