Dear technician, My TV has gradually built up a layer of yellowish with some gray cloudy patches (foggy like) across the screen. Can you tell what seems to be the problem? I had this TV for 4 years and last week I replaced a new lamp and was hoping this problem could go away. Many thanks, Frank Sze

Contact any service technician. This is a very very bad symptom with LCD TVs.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Check your cable connection at tv.

Sounds like not only is your backlight going but you have a bad case of dead pixels. You can do 1 of 3 things...

Turn your unit in under warranty for repair

If your unit is no longer in warranty you can brave taking it apart and replacing the glass unit and back lights yourself... Find the make/model of the screen after removing the plastic casing and type it in on either of the bottom sites,

www.sparepartswarehouse.com
www.laptopscreens.com

Or last option, sell it on ebay and lie lie lie about the quality of the unit and make sure that somewhere on the listing you put as is

Your TV most likely has one of two possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

• Screen looks 3D
• Colors don't line up
• One or more colors can't be adjusted when using the convergence menu.
• Screen is bowed or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.


TV set after fluid change



Solution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc

I would remove the battery immediatly as not to short circuit the very fragile circuits inside! Going from cold to warm, or warm to cold area's will cause a layer of humidity to built up on the tiny components inside, if the camera is not completely dried up (no condensation visible) every time this occurs then it will take even longer to completely dry up/out next time you use it in the same humid conditions. By now the microscopic conduits around/ in the lcd screen could already be creating an acid wich will coat the connections inside the camera, causing likely permanent damage to yuor camera. If you have to use a non weatherproof camera, then imediatly leave it in a dry, warm (not hot) area to completely dry out before next use, this could prolong/prevent any damage. The lcd in the camera has only very tiny openings, so when the screen fogs up it takes a long time longer to dry back out then it did to become foggy....Hope this helps some!

take off the back of the tv and clean the lenses and the foggy picture will go away

THE CABLE INPUT IS SERVED ON 22" VIZIO HOW AND WERE CAN I GO TO FIX THIS PROBLEM IN ATLANTA

You have to send it back to company to fix this problem>

Problem 1. Color patches at lower corners. These are caused by magnetic sources close to the TV. Do you have any Speakers close to the sides of the TV? Are they Magnetically sheilded? No? Move them away from the TV. Problem should then resolve itself in a couple of days. Problem2. Screen Slumping. Most likely a problem with the Pin cushion correction ckts. Get a good technician to have look. cost should not be much. Under 100$ plus Technician fees.