Same thing happened to me. All you have to do is hold the power button down on the tv, not the remote, for a few seconds. The screen will come back.
I suspect that when adding your audio cables you may have bumped another cable loose. If you look and don't see a loose connection, one thing that has helped me in the past is to just remove ALL cables completely (that means both sides of all cables from all devices) and and slowly connect one device at a time, checking that the newly added device functions properly before proceeding to the next device.
Good luck
SOURCE: Poor picture quality from 130 degree viewing angle on my LCD tv
It is unfortunate but "off angle" viewing will compromise the picture especially on larger TV's and LCD. Off angle viewing can come from the vertical axis or the horizontal, as you described. This is clearly illustrated with a laptop computer. Adjust the screen forward and back (vertical plane) and you will see very clearly that you get the brightest picture in a very small amount of range of the screen. Likewise, viewing from the side compromises picture as well.
I also don't believe that the delay is indicative of any problems.
SOURCE: sound but no picture
Most likely - the CCFL backlight is not getting the power it needs to come on. You can verify by shining a light on the front surface of the set - if you can just make out a dim image, then that is it. On some sets, the CCFL can be seen through the vents on the rear.
SOURCE: frozen picture on LG LCD 37"
Try One of your working TVS and connect it to your cable outlet of the TV that is having problems. If that TV Does not work then there may be a degraded fitting or the Leg coming of the splitter to that outlet could have a Low Signal Problem
Next Take the First TV that was not working properly and put it on the cable outlet of one of the TVs that is working properly and if the TV set works on that Channel then you know it is not your TV that it must be the cable
SOURCE: Insignia LCD TV 32 inch will not come on
I received no replies to my request. I guest I stumped 2 million techs. I'll just buy a new TV with a 5 yr warranty. No thanks to joining your service, I can do bad all by myself.
SOURCE: samsung 55" flat panel lcd
Does the backlight come on? or even flash on and off when the TV is switched on? I presume the standby light is showing 'blue' then. Do you have any sound? Also, when the TV remote is pressed, does the standby light flicker?
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