SEIKI TV SE47FY19 No Backlights

[jflores35]

I have a SEIKI TV model number SE47FY19 and I had no picture but I had sound. I did the "flashlight" test and I could see the menu but I had no backlights. I was told to replace the power supply but still had the same problem. Then, I tried to replace the T-Con Board and still had the same problem. Finally, I replaced the main board but now the TV has the standby light on (red light) but when I hit the Power button or use the remote, the TV does not turn on. Can ANYONE help me please?? Did I buy a faulty main board? Or is it the power supply? I'm really lost here

[dick_barton]

Re: SEIKI TV SE47FY19 No Backlights

Put the old mainboard back in. It looks as though you have a led problem.
Any pictures of your boards????

[jflores35]

Re: SEIKI TV SE47FY19 No Backlights

Here are the pictures

[dick_barton]

Re: SEIKI TV SE47FY19 No Backlights

What dc voltage do you have across the two legs of EC5 (capacitor) when you switch on.
Also just above EC5 (3rd picture) there's a blue ceramic capacitor which appears to have some sort of deposit on the circuit board alongside it. Is that capacitor damaged?

Edit
What voltages do you have on the pins of CON6 & CON8

[jflores35]

Re: SEIKI TV SE47FY19 No Backlights

I have no clue ...I don't have a Voltmeter and I am not too familiar measuring voltage. The thing is that I called SEIKI and I was referred to "ShopJimmy.com" for technical support. Then, ShopJimmy told me to either get help on FixYa.com or here (BadCaps.net) for this type of problem

[dick_barton]

Re: SEIKI TV SE47FY19 No Backlights

The forum can advise you but you need to be able to supply us with information asked for in order to progress any fault you have.

Since we can be living thousands of miles from you, we can neither see the set or take any voltage readings, which are needed.

Working with electrics can be potentially hazardous. I would be concerned that if you are unfamiliar with the use of the multimeter then I would respectfully suggest that a local TV repair shop may be your best option.

[dskall]

Re: SEIKI TV SE47FY19 No Backlights

Probably bad backlights. That will require the disassembly of the whole tv and testing of leds. It is a very delicate job to do without breaking panel. I suggest you watch some youtube videos on replacing backlights and see if you want to tackle job

[jflores35]

Re: SEIKI TV SE47FY19 No Backlights

Oh I see...well that can't be good ...thanks for the suggestions

[budm]

Re: SEIKI TV SE47FY19 No Backlights

That is why you should invest on a meter and learn how to use it to narrow down the problem, taking the panel apart is the last thing you want to do, and after that you still need to check each LED and all the connections.

[Andrew F. Ali]

Re: SEIKI TV SE47FY19 No Backlights

that is why you should invest on a meter and learn how to use it to narrow down the problem, taking the panel apart is the last thing you want to do, and after that you still need to check each led and all the connections.

+100