Insignia Plasma burnt chip y-buffer

[gordonb]

Hi. I just bought an insignia 42 inch plasma model# NS-P42Q-10A. It has no picture but sound ok.(I cannot afford to buy a working one) The first time I turned it on I saw a few green and red sparckles all over the screen. I hear some clicking noises.The red light beside the power switch blinks about 5 times then tv shuts off. When I opened it up I found a burnt chip on the Y-buffer pn LJ41-06109A (glowing pinhole tiny bit of smoke). With Y-buffer unplugged the tv stays on. I am trying to figure out how to test the Y-main pn LJ41-05779A before installing the new Y-buffer I ordered. What are the chances my Y-main is OK? I am worried about it blowing my new Y-buffer. I have read about unplugging the upper and lower buffers in sequence to see if I get a half screen but this tv does not seem to be setup like this. There are no upper and lower boards. Just the one long Y-buffer. A lot of what i've read doesnt seem to apply to this tv. All the output voltages from the power supply seem ok. I cannot find any bulged caps or blown fuses. After being on for about 5 minutes heatsinks on power supply slightly warm,Y-main heatsinks cool. Sorry about my longwinded question I just wanted to be as specific as possible in case i'm missing something. Any advice would be greatly appreciated. Thanks

[rayrod81]

Re: Insignia Plasma burnt chip y-buffer

Usually on this panel the Y-main and buffers both go at the same time and must be replaced as a pair. This is not always the case but if I were you I would check the FETs and transistors on the Y-main for shorts before you put the new buffer in.