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An lcd tv has to have a light source behind it to see the picture. Older ones have flouresent tubes. Newer set have light emiting diodes(led). You need to determine if the backlight is turning off or is set loosing signal. If you press the menu button on the Insignia remote does the menu appear on the screen. If not hold a flashlight on the front of the screen. if you can slightly see some video the the back light is off. If the menu shows then check the signal source. If back light is out the replace the inverter board.
No Sync indicates that the input signal doesn't match the type of signal that the TV can read. A digital source going to an analog input could cause the issue.
What is your source for the signal?
If you are using the DVI connection on the TV to connect to a computer, try using the VGA input instead. Unfortunately not all TVs can interpret the computer's digital signal. (It is different than the digital signal from a set top box.)
Before you throw it in the trash, check the supply voltage to the panel ballast. You should see 24v coming off the power board... this is what you want to check. Second, check to see is the ballast is being given an "ON" signal.. you will find this signal on the same connector or one of the others going to the ballast (some models have 2 connectors from power supply to ballast. The "ON" signal will come on shortly after you press the power button. If you have both, you either have a bad ballast or a bad lamp inside the panel assembly. The lamp.. no fix, junk the TV; the ballast.. you could search high and low for one or try to fix it yourself; no 24v, check with MCM Electronics for a power supply; no, "ON" signal, your main PCB is suspect. I hope this was helpful, best wishes.
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to two things that will cause the No Signal message to come up are – no data
available for closed captioning and a weak signal input. Your TV is in the
Closed Captioning Mode. To turn off simply bring up the on screen menu and
scroll down to the part that says closed captioning and turn this function off!
With the closed captioning block displayed and the program being viewed is not
sending out closed captioning signals the TV will display, No Signal!
If this doesn’t resolve your
issue then the problem may be with the processor failing and it is causing a
random read of the EPROM to display the No Signal message.
I’ll suggest you to run the HDMI
from the PVR (personal video recorder) directly to the TV (mute the TV), and
then run the optical audio from the PVR directly into the receiver's optical
in. The closed captioning is something that is addressed in analog broadcasts,
but not necessarily digital broadcasts.
Try using Component cables if
this doesn’t make a difference. After using components cables your issue will
Please do accept the solution if
the issue is resolved or else revert for further assistance.
Since you are getting the signal from the satellite, leave the satellite receiver ON and press input on the TV buttons until you get the signal back, wait 2 seconds after pressing the input button. Make sure the TV is on channel 3 if you are using the antenna input.
Let me know if you need further assistance.