Question about ViewSonic N4785p 47 in. LCD TV

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My Viewsonic 4785P is out of warranty. Problem is showing in different ways: image stays but sound goes then comes back, or not; everything shuts down and then comes back, or not; other times there is a very strident sound as if the set will explode. A tv tech suggested on the phone that the mother board could be either about to die or corrupted by my cable device and advised to shut down everything for 24 hours. Went very nicely then ... for 3 days and the same thing starts same way again What to do ? many thanks

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A problem like this can be caused by RF interference. Shut it all down again and move the converter, any cordless or cell phones, wireless PC's, routers, etc. so nothing is within 3 feet of your set. A poor ground on your converter can also cause RF interference. Make sure you have a grounded plug going to it, and it is connected to a grounded wall outlet....likewise for your set....and by no means have it near a microwave oven!

Posted on Apr 10, 2011

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Obviously geikalok is retarded and doesn't know the difference between a monitor and a printer.

You have a vary unusual symptom. What happens when you change the resolution of your computer to match what the monitor can do? It should be able to handle 1920 x 1200 so I doubt your resolution is too high. Unfortunately I think you may be having a problem with your main board, and there is also a slight chance your power board is going bad (which can sometimes cause some unusual symptoms). You first should check to make sure the unit is no longer under the 3 year warranty (if it is, go to viewsonic.com). You can open the unit up and check the power board for capacitors that are bad but that is unusual in this model, although the power board going bad from other causes is not unusual in this model. You can measure the power voltages on the power board, but if they are OK then most likely you will have to have the main board replaced. I would recommend contacting Viewsonic.

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From your description (and as a servicer), I would be looking for a component that is heat sensitive. These types of problems are fairly easy to locate and resolve.

Please take this in for warranty service and update this when you find out the details.

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Hi.
Are you able to see a slight image on it at dusk and maybe with the help of a flashlight. since your blue light stays on the video board, may be okay.
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Only way to really tell is to open it up.
If you unplug the screen to video board ribbon, you may notice a different effect in the screen lighting.
There is a chance one of your bulbs is creating a problem
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ebaysbammbammfran

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