Chosen Solution
I have a 6 year old Samsung TV, model # UN46EH6000F. It works fine for about 2 weeks and then will randomly not turn on. The red light at the bottom of the unit does not light up during this time so it appears the unit is getting no power even though it is plugged in. The remedy has been to unplug the TV for about 30 minutes and then plug it back in. We’ve been doing this for several months now. Recently it’s been acting even more sporadic and is struggling to turn at all even after it’s been unplugged for an extended period of time. I purchased a new power cord, took off the back cover and inspected everything, got an air duster and cleaned all the components inside. I have attached pictures of the model number, the back of the TV with the cover off and each of the various components. Since it appears to be a power issue I took a picture of both the front and back of the board with power input. Any help or ideas would be greatly appreciated!
You have bad capacitors on the power supply board. Though yours don’t look bad at least one of them is. You have to de-solder them and test them to find out which one or ones are bad. If you don’t want to do thatthen go on ebay and buy one of there. the ones for your model tv are cheap. You can pick one up for 20 bucks. Then just swap them out but be careful when you take it out. at least leave it unplugged for 4 hours cause it can shock you. the capacitors hold voltage in them for a couple hours. after 4 hours or how ever long you want take a screw driveer and short the big capacitor out by touching the to leads together with screw driver. Don’t kill yourself please because they can hold like 450 volts. I am not responsible for any damage you do or injury you do to yourself.
@dfkunz023 I do agree that this definitely sounds like a power board. The give-away is that you do not even get a standby light. I have seen more failure due to FET and diode issues over the last few years than capacitor issue. Granted LG and Samsung did have a bad run of choosing bad caps but even they have smarted up. If you have the skills and the tools to resolder those caps, do go ahead and give it a try. Otherwise, you can check your power board with the attached BN44-00498A schematics.
