Ok, here is the rub. The power line going into my parents house got zapped by a lighting bolt. It knocked out 3 tv's, a satellite box, satellite dish components, 1 computer, 1 light fixture, 1 light switch, 2 GFCI socktes, and threw just about every breaker in the house. In other words, it did a number on the house. My dad compared the ensuing thunder crack to the sound of a 155mm Howitzer shell impacting the earth. He would know(1st Calvary Division '66 to '67). I am hoping to get some help with this tv, and possibly the other 2 tv's to help take the burden of my parents pocket book. I figure the mobo got zapped on the computer, so it is probably toast, but well, I'll crack it open anyhow to take a look.
This Westinghouse is the first of the 3 tv's. Here are the voltages on the power supply output:
+12V = 0V
+12V = 0V
GND
GND
+3V = 0V
+5V = 0V
GND
GND
On/Off = 0V
DIM = 0V
With those voltages listed I am pretty sure this power supply is graveyard dead. I have checked everything I know how to check on it. There is one diode, D909, that I am getting .018 both ways when I check using the diode check on my DMM. With that being said, I assume it is a Zener by the way it looks. But I may be wrong, It is in the red box in the pic. I have checked all of the resistors, and the diodes, and caps on the bottom that I could without pulling them out of circuit. I have really come to hate most smd components because unless you work with them alot, then 3/4's of the time you dont even know what the hell it's value is. The resistors are usually marked well, why they cant do the same with the caps and diodes is beyond me. The MOSFET Q901 has voltage to the drain. I pulled it off of the board, and checked it. It is switching as it should. That is about all I can do up to this point. Any help with this would be greatly appreciated!