WE HAVE REPLACED OUR BULB ONE TIME ALREADY,

Good quiestion... Could be a simple fix. Make sure tv in cool befor doing this,you can damage it if it is not. Take the bulb out and take a bottle of caned air and blow out any dust.Also check if the lamp is installed in correctly,may not be in strait"happons alot"or not pushed in all the way. Also could be the wrong lamp...Several look the same but are diffrent wattages.Acording to the model you posted it has no lamp. It is a crt projection tv. If the replaced one of the crt's then the focas might need adjusting,or the convergence needs to be re-adjusted. Please let me know more about the repair you had. if you smoke in the house,Can be as simple ad cleaning your mirror.
But i need to know more about your type of tv,and the work that was done to help you out better. Todd