The TV has worked perfectly for a year and a half or so, but a thunderstorm passed the other day, and now it does absolutely nothing......NO lights, NO responses to switches or remote. The TV is plugged into a surge protector strip along with a DVD player, Satellite box, and VCR. Those all appear to be working; at least they have their "ready" lights on. I suspected a fuse, and took the case off the TV and found a line fuse, but it checked good with an ohmeter. There are no burnt smells, and no unsightly capacitors or other components inside. What should I check next? Thanks
Take a look at D517 in the power supply for faulty solder joints. That's a common component problem in these units. Otherwise, if enough transient voltage got by to do any harm you might want to test the following: V504 = 2sa1668 R523 = 56 Ohm 1w N502 = Tlp421 optocoupler IC D509 = 1n4148 If any of this has you scratching your head it's probably shop time... Hope this helps, let me know... Bill
Posted on Jun 20, 2007
83 views
Usually answered in minutes!
Hi Bill:
Thanks for the advice. I was out of town for a few days. I was encouraged by your "common problem" comment, but when I checked, the joints looked fine. I resoldered them to be sure, with no change. I tested R523 and it's fine. Your other ideas are over my head, or maybe just beyond the reach of my test equipment; I don't know what they mean. Unless you have other (simpler) advice, I guess it's shop time.
Thanks
Mike
i have the insignia hd30 tv the unit will not power up . so i have no power there is a clicking noise present . there is olso a burt diode that i can't find a replacement for unless i buy 1000pcs.saturday im going to our local universary when my father work in the lasar lab too see what they may have . boy a blow fuse would have been nice . but only half the fun
×