I was working on this tv because half the screen had went out as in bad connection or bad screen.I could wiggle cable going to screen a bit and get a full pic but one side not clear but then I Stuck a screwdriver in between frame and tiny boards that run along top of tv that has the ribbons that send the picture onto screen and the entire picture both sides went blank and now I have back lights on and no picture of any kind and if I unhook cables from main board to screen it has no effect or even flicker on screen.My question is could I have shorted out something on the main board and or on the tiny long green boards that run along top of frame??? i can purchase a new main board but I wonder if I already had a bad screen and it would not be worth it??? thank you in advance for any help,
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Re: Vizio VL470M BACKLIGHTS BUT NO PICTURE
Hmm... now that was a mistake to do... In order to test that main board in the condition the TV is in right now you need to check the LVDS outputs on the main board with an oscilloscope, in order to make sure on what board the problem lies. Could also be that the panel drivers.
So if you can get your hands on a 100mhz or so oscilloscope go from there. Other than that you may waste some $$$. You could try to only plug in one ribbon cable at the time and see what that does. Also inspect that little board for fuses. -
Re: Vizio VL470M BACKLIGHTS BUT NO PICTURE
Yes it was a mistake and a lesson learned. U can hook unhook wiggle do whatever with ribbons now and it has no effect on the grey color which is just back lights shining through screen on tv. I also will check those panel drivers for a fuse . Thank youComment
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