Question about Vizio Vf550m 55-inch Full Hd 1080p 120 Hz Lcd Hdtv

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Small dust lines behind screen

Small dust line in picture not on front picture screen

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6ya6ya
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Posted on Jan 02, 2017

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jerry_kramer
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SOURCE: What part is likely causing vertical lines?

Probably your inverter board

Posted on Nov 11, 2015

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White lines across tv screen


Without seeing the lines I can't be sure what your set has wrong, but here are a some possibilities:

If the lines are lines are confined to the top inch or two of the screen and the picture looks otherwise normal, the trouble is bad capacitors in the vertical output circuit. Fixable by replacing the bad parts.

If diagonal lines are across the entire face of the picture tube and the picture looks washed out, the trouble is often a bad capacitor on the 200-volt line to the picture tube. This may be on the main circuit board near the horizontal output transformer, or on the small circuit board plugged onto the end of the picture tube. Again, replacing the bad capacitor can fix this.

If your TV is actually an RCA, someone may have bumped a rear-panel adjustment. On the back of the TV near the bottom right are two small knobs. RCA left these adjustments exposed inside of putting them inside the set like other manufacturers. These sometimes get bumped if someone was behind the set cleaning, or if a pet got back there and hit them with a tail. The top knob adjusts focus, and the bottom knob adjusts something called G2 or screen voltage. If this gets turned up too high it can cause the faded picture and diagonal white lines. Turn the adjustment down until a black screen looks black instead of gray.

A bad picture tube or horizontal output transformer can also cause lines through the picture. If this is the case with your set, it's time for a new TV. The transformer is relatively inexpensive but labor costs aren't, and the repair bill may exceed $200. If the tube is bad, there's no point even considering repair. The tube cost alone exceeds the cost of new TV.

Hopefully your lines are easy and cheap to fix. Good luck, and thanks for using Fixya!

Jul 22, 2011 | RCA F35673MB 35" TV

1 Answer

2002 power steering leak.. from drivers side behind engine.. looks like about in front of drivers feet.... a bracket is in the way to see real good from just looking behind drivers front wheel. cant see...


I am 99.9% sure you have a steering rack leaking, this is a very common problem with this vehicle. The easy way to check is to take a small pick and poke one of the ribs of the boot / dust cover of the rack. Being that this is a dust cover there should be no fluid drip out, if fluid is present replace the steering rack.

Jan 22, 2011 | 2002 Dodge Caravan

1 Answer

Dull picture how do I clean blub?


Its the small mirror in front behind the screen assembly needs cleaning. Dust gets the picture dim and dull looking.

Sep 22, 2010 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

When the screen is dark there are lines that run back and forth across the screen which is only noticable when pitcure is dark immage.


the screen bias needs to be turned down-ehind the front cover which is behind the grille there is a small black square about 3 inch square 6 little knobs sticking out 3 say in small letters screen and 3 say focus, don't adjust the focus just the screen for the coresponding color that shows up when picture is dark.best way to do this is darken the room and put it on video input with no signal if lines are white slowly
adjust 1 color after the other counterclockwise untill
lines disappear if only 1 color shows then only adjust the knob with the matching color. this is a very fine adjustment, to much will make your auto focus stop working. check it after you are done

Jun 20, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Picture fades in and out to the color blue. sometimes entire picture is blue


id check the blue screen control first
its at the bottom of the set you will have to take the front panel off and behind it is another small black panel remove that one
and to select any function those controls need to be attached so slide that front panel to the left there and take you remote put the tv on video input
and there are sic controls on this little black screen control block
look for the screen controls and turn the blue one just slightly clockwise and you will see the blue screen will light up and you will have little arched lines turn the control back slowly till the lines disaper and the screen goes black

and then cycle the set off give it five mins or so and restart it and see if every thing returns and your video is being displayed then switch it back to your input and view and reassemble

Nov 19, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Screen is red with lines when channel is changed


If its a kp-51hw40 : go to an unused video input and look at the screen---if it is redish in the background with curved faint trace lines you have one of two things wrong; First: the red "screen" control may be set too high. Second: you may have a problem with the RED picture tube.


To try to adjust the RED screen down you have to remove the entire front grill plate on the front of the TV(some have screws on the back on either side that have to be removed---and then you should be able to pop it out. Behind it there is a masonite inspection plate held in with screws----Once you have that off look for a SMALL SQUARE BLACK PLASTIC BLOCK; it has 6 black adjustable controls---you have to use a flashlight and look carefully---one row left to right will be marked FOCUS--DON'T TOUCH THOSE---THE OTHER ROW left to right will be marked SCREEN; if you look carefully you will see marked by each r (red) g (Green) b (blue)
you want to locate the RED SCREEN CONTROL.

WITH the set still on a blank video input where you can see it clearly turn the RED Screen Control to the left until the lines and red tint go away---do this slowly and make sure you are adjusting the RED screen--not the FOCUS.


IF this has been helpful give me a vote here as I do this for free; yesterday I adjusted one of these in a home that was blue with the faint lines---about 15 minute job for me.

if you have questions or need help:

etower.766@netzero.net

Aug 23, 2009 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Lines on the screen


Are they thin, white lines running east to west? If so, they are called retrace lines and indicate that the screen settings for the picture tubes is set too high or there may be a mal-function of the CRT driver circuitry. Try adjusting the screen controls which are located behind the front grill of the TV behind an access panel. Once you remove the grill and access panel, you'll see a small control assembly the has two sets of controls. Three for adjusting the red, green, and blue focus, the other, the red, blue, and green screen controls. To adjust correctly, put the TV on an unused input(dark, blank picture) and adjust until there are no visable retrace lines or color in the image.

michtech

Feb 14, 2009 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

Sony kp-65wv700


take the back off there should be a small rectangle with 6 buttons on it 3 for focus and 3 for the G2 (screens) some models have this control in the front behind the speaker grille behind an access panel and others have the control switch on the circuit board that is attav=ched to the crt neck. Either way its just a small switch much like a volume switch but smaller. Depending on what chassis you have it will be in one of the 3 areas I have mentioned. just turn it down a little. If that doesnt take the lines away you will need to trouble shoot the blue drive circuit.

Mar 21, 2008 | Televison & Video

1 Answer

Sony KP-65WV700 65


This may be nothing more than dirt, hair or dust on the picture tube magnifier glass ( you can clean this by opening the front and cleaning like you would a window glass) or it may be more serious like a high voltage divider control. I would suggest you try cleaning the tubes first and if it's not that, then seek qualified help. ( PS. Always unplug the set from the wall before working inside the set ).
I hope this has helped.
Happy President Day.
Ed
NC Electronics
Mills, Wyoming

Feb 18, 2008 | Sony KP-65WV700 65" Rear Projection HDTV

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