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Aric
Aric, Technician
Category: TV
Satisfied Customers: 34491
Experience:  10+ yrs. experience installing and repairing TVs and A/V systems. Owner of A/V installation and repair business.
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Hi I have a sharp aquos model lc-52d65u it has the green blinking

Customer Question

Hi I have a sharp aquos model lc-52d65u it has the green blinking light it powers on for about 2 seconds an goes to black screen also has no sound I just recently replaced the power supply board but did not help. Can you please help I read that I could be the main board.
Submitted: 1 year ago.
Category: TV
Expert:  Aric replied 1 year ago.
Hello and thank you for the question.

When the screen goes black, if you shine a flashlight at the screen and look very very closely, can you see a dimly lit image of the program behind the screen?

Also, when it goes black, if you press MENU, will the MENU show on the screen?

Also, please explain exactly when the power light blinks.
Customer: replied 1 year ago.


ok when I plug the tv in it starts blinking the green light then I hold the power butting till the light turns red then I power it up the light gets yellow then green it turns on for a second an turns of no dim light or menu

Expert:  Aric replied 1 year ago.

Thanks Eddie.

Now, in your reply you said "no dim light or menu".

I had asked, "When the screen goes black, if you shine a flashlight at the screen and look very very closely, can you see a dimly lit image of the program behind the screen?"

Have you tried the flashlight test?
Customer: replied 1 year ago.


yes I just tried it no dim light

Expert:  Aric replied 1 year ago.
Thanks for the reply.

So when you first power on the TV, you see an image on the screen?

Then what happens, does the screen go black, or does the TV actually power itself off?
Customer: replied 1 year ago.

the tv goes black but the green light stays blinking

Expert:  Aric replied 1 year ago.
So, you said the green light blinked for a bit, then stopped when you got the image.

Then you lose the image and the green light STARTS blinking again?

Also is the green light blinking continuously, or in a pattern?

If a pattern, what is the specific pattern?
Customer: replied 1 year ago.


a blink every second an continues like that

Expert:  Aric replied 1 year ago.
Darken the lights in the room, and please tell me if the screen is completely pitch black.
Customer: replied 1 year ago.


yes I turned the light off an the set is completely pitch black

Expert:  Aric replied 1 year ago.
Either your Backlight Inverter boards are shorted and causing the power supply to shut down, or your mainboard is causing it to shut down.

Too determine which is causing the problem, disconnect the Inverter Boards and then see if the sound stays running, and if the power light continues to remain steady lit green.

If so, then you have a faulty Backlight Inverter and would need to replace it.

If the symptoms are EXACTLY the same as they were previously, then you have a faulty Mainboard.

Aric, Technician
Category: TV
Satisfied Customers: 34491
Experience: 10+ yrs. experience installing and repairing TVs and A/V systems. Owner of A/V installation and repair business.
Aric and 2 other TV Specialists are ready to help you
Customer: replied 1 year ago.


there is no sound on the set

Expert:  Aric replied 1 year ago.
Okay, then we need to back up. When you say "it powers on for 2 seconds", what EXACTLY does it do?
Customer: replied 1 year ago.

When it powers up the tv come on for a second like chanenl 67 with no sound then it goes black with no image an the blinking green light till i hold the power button an turn off the set


 

Expert:  Aric replied 1 year ago.
Thank you. Please try the test an unplug the inverter as stated above, then get back to me and let me know what happens.
Customer: replied 1 year ago.

Yes I tried it last night I unpluged the inverter an


I still get the blinking green light so it must be the main board

Expert:  Aric replied 1 year ago.
Thanks for the reply.

That is what I would do too is replace the Mainboard.
Customer: replied 1 year ago.

Thank you

Customer: replied 1 year ago.

I replaced the main board an still nothing

Expert:  Aric replied 1 year ago.
So you're still getting the channel number on the screen but no image even with the new mainboard?

How about if you connect another device such as a DVD player?
Customer: replied 1 year ago.

Ok I will try that

Expert:  Aric replied 1 year ago.
Okay sounds good, let me know what happens.

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Aric
Aric
TV Technician
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10+ yrs. experience installing and repairing TVs and A/V systems. Owner of A/V installation and repair business.