- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Video output section of your tv is in trouble. Either it not gets proper voltage [low voltage if voltage is there]; or video output Ic or transistors whichever used may got damaged. Never switch on the tv in this condition; that picture tube may get damaged. Get it repaired soon.
This trouble symptom picture wide or"blooming", the picture becomes dim even with the brightness control full on,and there is an abnormal enlargement of picture or raster.Usually,the enlargement is uniform,but there may be some defocusing.In some circuits,the brightness control operatesin reverse(rotating the control for an increase in brightness produces a decrease) after reaching a critical point on the control. If the picture wide is not accompanied by insufficient width(a symptom of horizontal output failure) the probable cause is a high volatge circuit ony,particularly the HV rectifier and HV winding.Any circuit problem that reduces but does not completely eliminate the high-voltage output to the picture tube second anode can cause overscan. The most likely defects are leaking high-voltage capacitors,defective high voltge tube rectifiers,leaking high voltage leads,defects in high voltage circuit protective resistance,and shorted turns in high voltage winding of the flyback transformer.
More than likely it's not the crt. If the picture has "foldover" at the top of where the picture is currently, then more than likely there are bad caps. in the vertical scan circuit. If not, the vertical sizing probably just needs to be adjusted. You will have to get in to the service menu to do that.
If the picture is fuzzy (out of focus) it may have a focus adjustment
on the flyback transformer. Possibly an adjustment available from the
outside, through the back. Look for any markings on the plastic housing
indicating Focus, Brightness etc.. You can use a small screwdriver
through the labeled holes in the case to make adjustments.
If the picture is crisp, but faint or the colors seem washed out it may
be the tube is at it's end of life or needs to be rejuvenated. TV shops
can rejuvenate tubes but it's not cheap.
The circuit board is probably broken. OR maybe also the picture tube.
If service shops in your area give free estimates, it might be ok to have someone checkit for you. Newer tv's however can be replaced cheaper than repaired unless they cost several hundred dollars.
The smaller size of the circuit boards make it very difficult to repair them.
Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket
Your deflection yoke (a coil around the neck of the picture tube) must have gotten turned.
Your can turn the picture upside down by rotating this coil.
If your set is in warranty, you should return it. When this "yoke" is adjusted the color is affected too. If you try this yourself you'd void the warranty and mess up your color.