Why has top third of picture started turning dark?

Its ccd faulty, its old series if its avail replace it & check...vinay

Appears that you have an issue with the t con boardl It is reponsible for the image you see as well as any anomalies that appear. And you have your share!!! Go here for parts TV Parts Universal TV Stands DLP Chips ShopJimmy

Hello,

The problem actually is from a lamp in the unit, it is getting damaged gradually that is why it is two third of the screen that has gone dark. once it gets completely damaged, the entire screen will turn dark.

Try to ***** the lamp of the television and replace it with a new one.

After doing that your television will be in good condition once again.

Take care and good luck

Hello,

No, you do not have a bad circuit board, the problem is still from the lamp you fixed on it. Have it checked once again to see to it that there was no slight difference in the way you have been fixing it.

If you have a bad circuit board, there would be a complete alteration in the functioning of the television.

Since the problem has to do with the lighting and picture of the television, it has to do with either the lamp or t-com board, so check them both.

Take care

I have Sony KDL-32XBR9 and I have noticed a similar problem. When the picture is showing mostly black, for example during the ending credits of a movie, the TV will further darken the display. Once the picture lightens back up, the TV will adjust the brightness of the display back to normal. I just called Sony customer support and they indicated it was a firmware problem and they will be sending a USB device in the mail to update the firmware. Hope this helps.

60PL9200D/37 When I unplug it for a while and turn it back on, the picture starts to come on, but it turns dark. And the red lights on the left and right side of the power button blink. Sound but no picture.

Those lines tell me that you may have a leaky electrolytic capacitor in your vertical circuit.

Symptom: NO PICTURE
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: DARK PICTURE
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: DARK PICTURE
Cause: DEFECTIVE C724

This 30" flat screen TV set may have a problem in the high voltage circuit of the TV set. You may be able to adjust this by taking off the back of the TV set. Look for the block where the large red wire runs up to the top of the picture tube. On this block will be two controls. one will say screen and one will say focus. Try and slowly turn the control that says screen or S on it clockwise and see if you can make the picture brighter. Turn up the control till you just start to see faint lines in the picture, then back the control down till the lines go away. If the picture does not come up when you turn this up, and all you get is a blank screen, you will need to have this set repaired by a qualified repair person. Good Luck