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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I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started βfading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly βnew' Tcon board this time, and... -
Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!
My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.
This time the original cable broke too close to the screen, it can't be fixed without tearing the screen... -
I'm currently trying to diagnose and fix my Vizio TV (Model M50-C1). I've tried a number of different basic solutions, but I'm trying to determine if my issue is currently a failing panel, T-Con board, or main board (or something else entirely) and whether or not it is worth my time to fix it. Details of the issue and what I've tried are below as well as why I think it is either a bad panel, T-Con board, or main board.
The Issue: The TV will be on and working fine but after the TV is on for ~5-10 minutes the screen will freeze (with sound continuing) until the TV reboots itself. While... -
Have a Samsung UN50NU7400 which shows a boot screen and a screen saver if left on long enough but no picture ?
Would a moving screen saver confirm that the panel is ok or it could still be a panel issue ? -
Hi guys
I'm trying to fix this laptop screen
Basically the owner is a computer shop and they brought it to me with two screens. They said the repair shop they use could not fix it, so I thought i would try to see if I am better than their current repairer!
OK so I have the original screen which works but has lines across the bottom quarter of the screen
I have the replacement screen, which they fitted and it worked. They then put the laptop on one side for a couple of weeks until they found a buyer. When they showed it to the buyer, the screen would...
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