Picture get dark than light

If your TV seems to be darker than you think it should be, it is possible that the problem is with the light sensor. The light sensor will automatically adjust the picture brightness based on the ambient light that is in the room, (i.e. if the room is bright the picture will also be bright, if it is dark the picture will also be dark).

To turn this feature off go to Settings > General Setup > Light Sensor.

Hate to give you some bad news...But most likely you have a defective screen. You may be lucky and just have a bad T-con board. Which will do the same thing. But, this is a slim chance of it being the issue. As I have had many of these with bad screens. And only 2 were the T-con board which the color was off and pict was darker than normal. It is the board at the top center of the TV.

It seems that one of the rear lamps burned. Have you tried to open Setup of the TV and raise the level of light?

The model indicated here is rear projection that uses three picture tubes.

If rear cover is removed--can be done by removing entire front screen but there are hazards like damaging the screen---with rear cover removed clean the lens in the three round cyclinders which point up and are hard to miss===

They are the light source for the picture---there is if you look up inside and to the rear a mirror but unless grimy it rarely needs cleaning.

clean the lens with a lens cloth or even a paper towel with glass cleaner sprayed on the towel.

Put the tv it in Standard mode,do the adjustment to the brightness up to +60 shuold be find in the darkness seen.

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.

This is a characteristic of the dynamic backlight used on this set.Turn off the dynamic contrast in the customer menu this should solve your problem.

There should be a setting in the menu of the TV to turn off the auto dim feature (used for adjusting the brightness of the picture depending on ambient room lighting) I don't have a Sony LCD here with me to walk you through the menu settings, but I am certain it is there somewhere. (Chased this issue for the wife who had the same displeasure you're having)

Most sets have electronic service adjustments. Contact manufacture for nearest service center.

It sounds like the backlight is going bad or possibly the panel. Let me see a picture of it. Talk to you later. Jay