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Do you get same error code (flashing light on TV front) before power board replacement?
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- Do you get same error code (flashing light on TV front) before power board replacement?
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OK, power light flashing 2 long and 5 short is an error code and indicates panel_12V line failure that means either t-con board isn't getting 12V from power board for some reason or t-con board itself is defective and sending failure signal.
Please check the connectors that were removed for power board replacement to make sure all are plugged securely and tight, also check 12V on t-con board connector (it would be 4 pin connector) with multimeter.
If 12V are available for a second when turning power On then t-con board is bad and if volts are not available then power board is defective.
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Yes, it is quite possible and you can confirm its 12V output by using multimeter on connector of t-con board as explained in my previous reply
Do you need any further assistance with this question?
Usually pin-1 is hot to measure 12V
OK, it seems you got defective power supply board that should be returned to supplier to get a working one as replacement.
I hope these info will help. If you have any additional questions, feel free to ask. If you're satisfied, please rate me a 5-star at the top of your page so I can get credit of my work on website.Thank you.