This TV was given to me by a friend a few months ago. After spending countless hours pulled in many directed reading different things and trying to figure this beast out I figured I would ask for help here. I know this is not the best starting point, but I do not know which direction to go in next. If someone could point me in the right direction I would greatly appreciate it.
The TV is a Insignia NS-LCD42HD and is a 2007 model. I cannot find anything for it manual wise as everything I find as well as talk is the -09 Model and I read on here that the -09 is the year. The -09 model power supply appears to be different (to me) so I have had issues trying to figure it out.
Problem - Will not turn on, No lights of any kind, No sounds, nothing. (friend told me that during a storm lights flickered and did not have it hook up to power strip) been dead since.
I attached some pictures showing the voltages I was getting. The PS appears to be getting good power from the main line, but I am getting nothing on the Cold Side? Correct me if I am wrong but I think that is what that side is called. I enclosed a picture showing what I am seeing on my voltmeter. The right side has power and the left does not, however I was able to see a very small amount of voltage in some of the capacitors on the left side.
Since I am getting no lights I have read that it needs 5v in standby. I saw that Bad capacitors could be a cause and have checked with a magnifying glass and everything looks fine. I also read that it could be shorted diodes or transistors on the DC output side, the side that I think is the cold side and I am getting very little if any power to. I could check the voltage regulators on the main board, but if there is no power at all going to the MB (all voltage reading from the supply board connectors 5v,PSON,24V,12V, etc were 0v) how would it know to turn the rest of the power on? Obviously I am new and know very little but would really appreciate any advice on what to test / try next. I attached picture of the PSU as well and if you need better closeups please let me know.
The TV is a Insignia NS-LCD42HD and is a 2007 model. I cannot find anything for it manual wise as everything I find as well as talk is the -09 Model and I read on here that the -09 is the year. The -09 model power supply appears to be different (to me) so I have had issues trying to figure it out.
Problem - Will not turn on, No lights of any kind, No sounds, nothing. (friend told me that during a storm lights flickered and did not have it hook up to power strip) been dead since.
I attached some pictures showing the voltages I was getting. The PS appears to be getting good power from the main line, but I am getting nothing on the Cold Side? Correct me if I am wrong but I think that is what that side is called. I enclosed a picture showing what I am seeing on my voltmeter. The right side has power and the left does not, however I was able to see a very small amount of voltage in some of the capacitors on the left side.
Since I am getting no lights I have read that it needs 5v in standby. I saw that Bad capacitors could be a cause and have checked with a magnifying glass and everything looks fine. I also read that it could be shorted diodes or transistors on the DC output side, the side that I think is the cold side and I am getting very little if any power to. I could check the voltage regulators on the main board, but if there is no power at all going to the MB (all voltage reading from the supply board connectors 5v,PSON,24V,12V, etc were 0v) how would it know to turn the rest of the power on? Obviously I am new and know very little but would really appreciate any advice on what to test / try next. I attached picture of the PSU as well and if you need better closeups please let me know.
Attached Files
Thanks for clarifying that for me tom66. That does make sense that you should use the chassis when working on a power supply. Thanks for the tip! I'll be sure to do that from now on 
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