Obtained this Television from a friend who got it from a customer that was throwing it away because it no longer powered on. If it did turn on it would just turn off & on repeatedly not getting a picture at all. After testing in different temperature environments I was able to get it to power on finally but the next day temp changed in the house and it would no longer power back on.
The main things to go over in power issues is taking the LCD ore Plasma TV apart and checking the Capacitors. Caps bulge and can leak when this happens this is most likely the cause of it to no longer power on or flicker.
The power board isn’t very large.
First thing to do is take the stand off bottom very simple only a few long screws. Should get help when removing this. Best way I found to remove the stand is to leave it standing up unscrew the bolts and have some one help lift the TV off the stand.
You have to have the stand loose all screws removed in order to remove the Speakers that are attached to bottom base of TV.
Once the Stand is loose it’s time to go ahead and unplug speaker wires and remove speakers from the TV. It’s only like 2-4 screws to remove the speakers. Save screws that are for speakers put in bag and tape to speakers.
Move stand away save the screws in a bag and tape to the stand. Place TV face down on a clean counter top. Make sure there is nothing on the surface a screw or hard item will crack the screen if you do that may as well toss it at that point. Repairing a screen isn’t worth it.
With the Television face down its time to pull all the screws that are holding the frame of TV together. There will be quite a few make sure you save all of them. Once all are removed you will need a hard thin flat plastic pry tool or thin knife to unlock the back. Start at top right or left of the TV once you pop the first one just gently slide knife along the crease until the next lock and give the knife a push & slight pry upwards that will pop the lock every time do this around the whole frame until you take the back off. Take your time don’t just pull it open make sure no wire harnesses are taped or attached to the back plate of TV.
Now the back panel of the LEDTV is off and mainboard is exposed. You will be removing the Powerboard.
You will be removing the 4 screws that are on each corner of the larger aluminum-plate. Also go ahead and remove the small plate as well 2-screws on that plate.
I went ahead and circled the 6-screws in total.
Now that the Powerboard is out and the 2 plates are removed. Make sure to save the 6 screws you removed you will want to be putting the plates back on after repair is complete.
If you have a magnifying glass handy it will help. You will want to inspect the capacitors for buldging or leakage.
Circled is the capacitors you will want to look over.
If you don’t have one then you can look at capacitors by eye leakage or bulging capacitors are bad.
You can replace just the bad ones you see or you can just go ahead and replace every cap on the board 10-total.
If your not sure what a bad capacitor looks like these pictures will give you a good idea.
To remove capacitors you’ll need a Desoldering tool.
I purchased mine quite a few years back at Radio Shack for $14.99.
DO NOT REMOVE ALL THE CAPACITORS AT 1-TIME!
First you will look and see uF and Voltage they are “This is when a magnifying glass will come in handy”. They will not all be the same. It’s important to always get the right Voltage and uF.
Radio shack will not have capacitors of these values. You must buy from a parts repair shop or online.
have paper and pen handy to write down the values to bring with you when you are buying locally.
Once you have the right capacitors in hand at home. It’s now time to remove the caps. Remove 1 capacitor at a time and replace. The capacitors have a plus and minus> Positive will have the longer leg. When in the board they are both cut so you must look at the cap before pulling it to identify the negative it will be on the side of capacitor. The board will also most likely label the positive or negative hole. It’s very important you do not reverse them. Just observe the caps when in the board you should be able to find on the cap and board where the positive and negative are.
Weather you decided to replace just the bad ones or all of them. It’s time to put the board back in and connect the wires to the power board.
I left the back off when I tested if it came on after repair. Just hold the tv up on the plastic part when powering up if it comes on you have repaired your television “congratulations!!”
Once you confirmed TV is repaired unplug from outlet and put the back on listen for the clicks that means the locks snapped in place. Go ahead and put all the screws back in. Put speakers & stand back on. If you mount is to wall then just put speakers on and mount.
Happy New Year to all:-)
Hope this helps anyone out there who has this issue & Make /Model HDTV.
This kind of issue happens with all kinds of electronics. Keep your eye out.
Only issue still at hand is sound. Unfortunately the sound board is bad so have to use either a HT-Receiver or a sound bar for sound.