I just bought a 65 inch lgsuperuhd tv, I can’t turn on the picture it says no signal heck power of device and cable connection the power is on and the bell fire tv is on what do I do

what input did the store use, what input are you using. you may need to go to setup and select the input you will be using.

Without getting all technical your LED backlights are bad, the part of unhooking one ribbon cable and not having the repeated cycle would be normal in this model set.

Lines on the screen (vertical/horizontal lines, bands)

Image diagram of symptom


Press the HOME button on the remote to display the TV menu screen.
When the issue occurs in the Menu screenThere may be an issue with your TV. Follow these steps to troubleshoot:

1. Restart the TV and check if the issue is resolved.
   1. Turn off the TV and unplug the AC power cord (main lead).
   2. Keep the TV unplugged for 2 minutes.
   3. Plug in the AC power cord (main lead) and turn on the TV to check its status.
2. If the above steps does not help to resolve the symptom, the product may require service. Go to Product Repair.

When the issue occurs on other than the Menu screen There may be issues with the broadcast signal source, Cable/Satellite box, IPTV, or other devices such as a DVD player.
Follow these steps to troubleshoot:

NOTES:

• If this issue only happen to one particular channel or broadcaster, this may be due to the broadcast signal source. Please contact your service provider for further information.
• If you experience issues when connecting a TV and an Audio/Video device via an analogue cable (composite or component cable) or HDMI cable, check the following section of this article before proceeding the steps below: Screen issues (Lines/Blurred/Odd colours) from the Audio/Video device

1. Turn off any electrical or battery-operated devices that may be creating radio frequency (RF) interference.
2. If using an antenna, broadcast signals are reflected by nearby mountain or surrounding tall buildings and may cause ghosting in the picture.
   It is recommended to adjust the antenna direction and location.
3. Try plugging the power cord into a different electrical outlet and/or surge protector.
   These symptoms can occur if the electrical outlet is improperly wired or not producing the proper voltage.
   If using a surge protector or extension cord, it also could be faulty.

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How to perform a software update.

Clean the TV screen. Refer to the following FAQ.
How to care the LCD TV

If the above steps do not help to resolve the symptom, the product may require service. Go to Product Repair.

When the issue occurs on other than the Menu screen There may be issues with the TV settings, broadcast signal source, Cable/Satellite box, IPTV, or other devices such as a DVD player.

NOTE: If you experience issues when connecting a TV and an Audio/Video device via an analogue cable (composite or component cable) or HDMI cable, check the following section of this article before proceeding the steps below: Screen issues (Lines/Blurred/Odd colours) from the Audio/Video device

1. For TVs with the Motionflow function, select Standard or Off.
2. If using an antenna, broadcast signals are reflected by nearby mountain or surrounding tall buildings and may cause ghosting in the picture.
   It is recommended to adjust the antenna direction and location.
3. The quality obtained from DVD discs recorded on home DVD recorders often varies due to different quality settings being used on the recorders.
   Picture quality from VHS tapes often appears to be significantly worse than other sources, symptoms often include grainy and watery picture.
4. Reset your TV to the factory defaults. Refer to the instruction manual supplied with the product. Manuals are posted on your model support page.

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Picture and video on the TV is displayed doubly.
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The screen appears to have a cloudy, white shadow or bright spots when there is no input or when viewing very dark scenes.
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Adjusting the Picture setting on my Android TV

For other than Android TVs: Adjusting the Picture setting on my LCD TV

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How to reset an Android TV?
How to perform a power reset on a Sony television.

Update the software of your TV to the latest version.
How to perform a software update.

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Adjusting the Picture setting on my Android TV

For other than Android TVs: Adjusting the Picture setting on my LCD TV

If your TV has a reset function for its picture settings, follow the instructions below to reset the settings.

Press the HOME or MENU button on the remote control.

The next steps will depend on your TV menu options:

• Select Settings- Display & Sound, Picture & Display or Display - Picture or Picture adjustments - Advanced settings - Reset.
• Select Settings- Display - Picture - Reset.
• Select Settings - System Settings -Picture - Reset.
  NOTE: If your remote control has the Option button, you can reset the settings by pressing the Option button on the remote control - Picture or Picture Mode - Reset.

Restart the TV and check if the issue is resolved.

1. Turn off the TV and unplug the AC power cord (main lead).
2. Keep the TV unplugged for 2 minutes.
3. Plug in the AC power cord (main lead) and turn on the TV to check its status.

If the TV is connected to an active and stable Internet connection, install the latest TV software. Refer to the following FAQ.

• How to perform a software update.

If the above steps do not help to resolve the symptom, the product may require service. Go to Product Repair.

When the issue occurs on other than the Menu screen There may be issues with the TV settings, broadcast signal source, Cable/Satellite box, IPTV, or other devices such as a DVD player.

NOTE: If you experience issues when connecting a TV and an Audio/Video device via an analogue cable (composite or component cable) or HDMI cable, check the following section of this article before proceeding the steps below: Screen issues (Lines/Blurred/Odd colours) from the Audio/Video device

• If your TV has a reset function for its picture settings, follow the instructions below to reset the settings.
  1. Press the HOME or MENU button on the remote control.
  2. The next steps will depend on your TV menu options:
     • Select Settings- Display & Sound, Picture & Display or Display - Picture or Picture adjustments - Advanced settings - Reset.
     • Select Settings - Display - Picture - Reset.
     • Select Settings- System Settings - Picture - Reset.
       NOTE: If your remote control has the Option button, you can reset the settings by pressing the Option button on the remote control - Picture or Picture Mode - Reset.
• Check if the cable is firmly connected to the TV and the connected device and make sure it is not loose.
• Use a spare cable to replace the currently used one and see if the situation will improve.
• Use another input terminal of the TV.
  1. Connect your device to other input terminals of your TV.
  2. On the TV's supplied remote control, press the input button to switch to the input method that corresponds to the connected device and check if the situation improves.
• Connect another A/V device to your TV using the same input terminal to check whether the connected A/V device causes the issue.
• If using an antenna, broadcast signals are reflected by nearby mountain or surrounding tall buildings and may cause ghosting in the picture.
  It is recommended to adjust the antenna direction and location.
• Turn off any electrical or battery-operated devices that may be creating radio frequency (RF) interference.
• Reset your TV to the factory defaults:
  • For Android TVs: How to reset the Android TV to factory settings
  • For other than Android TVs: How to reset the television to the original factory settings

Bad cable, you didn't switch to correct input, incompatible source of video signal, devices didn't perform correct handshake. Connect devices, power them down and turn on again.

If this does not happen with other devices then I would say try a new video cable. HDMI cables can get very picky. If this happens at anytime then the inverter in TV is going out.

If you are conected VGA cable set your TV to PC input. When you turn your laptop press fn then
f8 that should transfer the signal to the LCD.

Thank you

check ur connection cables,,try new cables and diffrent video input,,,and even try a new device to send signal to tv,,you no dvd or bluray,,

Your TV only has a DVI input, not an HDMI which PS3 has as an output. You can buy a HDMI to DVI adapter and connect the HDMI out of the PS3 to the DVI input of the TV. To get the true HighDef video you need a HDMI input on the TV to enjoy the full capacity of the Blu ray capabilities of the PS3. DVI came out before the HDMI standard and your picture will look good but not like HDMI. I have the same problem with my samsung 65 inch. I Bought the wrong technology. I hope this helps and good luck!

Cable Looses signal power after 20m ... Install signal amplifier
https://youtu.be/AkiKf4G4UE0

have a tech look at your tv it needs to be repair checks can be made in the power supply.video circuit,or the IF CIRCUIT.good luck.