Chosen Solution
My television went almost entirely black screen on me after a power surge. The standby light is still on, and if i take the power connect out, sometimes the image comes up to connect it. The “Samsung TV” will also show for about 2 seconds, but no other images. About 2/3 of the screen has a blue glow, briefly also. I have the back cover off, and there are no obviously blown capacitors. What should i try next?? THANK YOU!
Update (07/27/2020) Thank you @jayeff and @jostewcrew ! The powerboard identification is easy, but which is the main board?
Update (07/27/2020) The image comes up to connect to one connect, but when i make that connection it all goes black. @jayjeff @jostewcrew @jostewcrew
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I can’t get to any settings menu from the screen prior to connecting the one connect, just the channel up/down menu. And there are no inputs directly to the boards other than LAN, USB and one connect, so i can’t try a direct connection. I’ll order the main board and go from there, but i guess the one connect could also be a problem. Thanks for your help, please let me know if you have any other thoughts!
@ctespinosa … it sounds like you have bad leds. to test, unplug the connector that leads to yhe main board from the power supply. your leds should turn on and remain on. if they do not, troubleshoot the leds/ power supply board. please upload a pic of your bluish screen you are referring to so that we can see what you see. post back with your findings for any additional assistance.
Hi @ctespinosa , Start with the basics to check if there is a problem with the backlighting or the power board. Disconnect the power from the TV and then remove the cable between the power board and the mainboard. Reconnect the power to the TV. The backlights should turn on full and stay on. There will be no picture because the mainboard is disconnected. If the backlights don’t turn on and stay on, then there is a problem with either the backlights or the power board. If the backlights don’t stay on, test the voltage at the LED power connector on the power board. If the voltage is >250V DC then there is a problem with the LED backlights. If the voltage is <50V DC then there is a problem with the power board. Also since the power board is turned on full when the mainboard cable is disconnected and power is applied to the TV, you can test all the voltages going to the mainboard (at the power board cable connector) to check if they are as marked on the board near to the connector. Be safety aware when measuring the voltages as there is exposed lethal AC voltage on the power board when the power is connected to the TV
