My wd65833 has developec the typical no picture but has sound. Bought a new bulb and still no pic. I can see that the bulb is lit up through the vents on the lamp door. Right in the middle of watching tv the screen froze but youcould still hear the tv show I was watching. I shut off the cable box and the tv and reset both. I turned both back on and since then I have sound but no picture. Any advice about what the problem could be is greatly appreciated. Im trying to fix this myself without breaking the bank.