Samsung 42" rear projection TV. Model # HC-P4252WX/XAC chassis # P59A. Replaced bad convergence IC's STK-392-010, & two 3.9 ohm fusible resistors. Unit works ok, & auto focus works ok, but how do you "tweak" the convergence? The mute, 182, power won't get into service menu. How do I get in? These IC's get quite hot. Anyone install colling fans in thse type sets? Thanks, Dani.