What part to replace on tv. led back lights going out. a few different strands have gone out over the course of 2 weeks so it seems unlikely it is the led's themselves. it is a vizio e60-c3

Hi, Jonathan,
It is a case of backlight failure. Some of the LEDs inside the panel have gone bad. Fixing this fault is a little risky and complicated because the LCD panel has to be dismantled to reach and replace the defective LEDs and you will need an expert to do it.
Good Luck

I would need to guess so since this is your money I would spend I will not say.

Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Depending on the type of TV the backlight will usually be either LED or CCFL. If the backlight is the only fault then the TV will still have sound and a bright light from a torch shone at an angle onto the screen should show a faint picture. Repair of the backlight is not a simple task and could be a number of different causes. LEDs are unlikely to fail in such a way as to blank the whole screen. CCFL tubes can cause the whole screen to go dark but replacement is very difficult. I would recommend getting a TV repair engineer to fix it.

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
Some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

Ask if the system was checked for leaks. Not just die checked but by actually hooking up gauges and watching. The system could be pulling in air ( and moisture) after being shut down. This is unlikely. But when you eliminate the obvious you have to start looking at the unlikely.

I got a Sharp Aquos Quattron LC-60LE847U, a 60inch LED TV, I only brought it for a year and 4 months, factory only a have one year warranty. Last week when my kid try to turn on the TV, the TV power light keep repeat blinking in 2 slow and 5 fast sequence, don't know what did it mean. When I press the power button, the light will stay on for few seconds and it kept blinking after, the TV cannot turn on at all.
My kid have called the Sharp help line in US, number found in user manual, but the Canada help line are different number, it is 1-877-278-6709, they told my kid to unplug the TV, hold down the Input and the Volume down key, then plug the power back on, the TV can turn into service mode, it have a K icon on the screen, but every time I selected the menu, it went away very quick. Then the customer assistant told my kid to call service.
When I did a lot of research, every solution seems to point to the power supply, so I bought a power supply from ebay, replaced it, it does the same thing, no different at all, then I turn the TV back on in service mode, to try to do a reset from the menu, upgrade the firmware, re-seat all ribbon cables of the main board and the middle logic board (Not sure what is that board call, it is in the middle of the TV), neither way can make any different, the TV light still blinking in same sequence.
So I kept doing the research, I find out another way to reset the TV back to factory setting just by holding down the Volume up and Channel down, then plug in the TV, kept hold it down those 2 buttons until the TV came back on. TV will reset for just by doing this. Happy news, problem seems to get fixed, but not 100 %. The TV seems no problem to turn off and on after reset, but if I unplugged it, the blinking problem will come back, but if I reset it one more time, it will works again until I unplug it again. It is better than completely dead.
Then I unplug the TV, removed all ribbon cables (6 ribbon connectors), use sand paper to clean all the ribbon cable contacts, don't rub it too hard in case the cable contacts get destroy, then re-seat all the ribbon cables. After I did that, everything back to normal and my TV got fixed completely.
This seems to be my way to fix it, not sure everyone can use the same method to fix their blinking power light problem, but I hope this tips can help some people to save big buck to the Sharp service. This TV is over $2000 dollars and I brought few pair of the expensive 3D glasses, I do hope it can last longer, didn't expect it have problem already, it just less than a year and half old and even I bought the power supply to tried to fix it but I ended up didn't needed to spend any money and solved the problem.
Hope this helps.

Hi,
Is it Mitsubishi WD-52628 TV? please confirm model number.
Unplug TV from AC outlet for couple of minutes, replug back in, turn power ON and check, still same problem?
Lets read error code in TV, press Device and Menu buttons on front of TV at same time for 6 seconds that will activate error code read process. Led will flash in 2 sequence with half second pause. count it and let me know the error code to proceed.
Thanks.

The most likely reason for the no picture might be the back light is gone and needs to be replaced, now as for the LED light blinking on different intervals is because its diagnosing it self unfortunately the user manual does not have any information on this part only by contacting the Phillips customer support you might get a better idea, but check your back light first it may just be that. Also try to check your Manufacturer warranty repair.

Yeppers. Sounds like the standby power supply has a bad capacitor in it and the regulator Ic is defective. These parts should only be replaced by quilified technician as there is very high voltage inside these sets. Good Luck