Dvd picture is darker than tv picture

Try watching a colour dvd not an old black and white movie

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

If you have the same problem with another input such as a DVD player, this TV might need attention by a qualified service technician.

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

1> sometimes supply of low voltage causes some disturbance in trasmitting video signals,it results in darker images while watching.

2> The DVD may have some scratchs or dust-spots or rough-coat on its recording surface ( reflecting LASER beam ) clean DVD and operate again.

3> your DVD player's SMPS (switched mode power supply ) circuitary fails to perform its function properly and giving irregular supply to video-audio card of the DVD player because of having some failure of electronics component housed on this circuitory.

4> switch the mode among 'PAL' , 'NTSC' , 'AUTO' and OTHER in playback mode options ,one by one taking  some minutes.

Now , your problem is solved , Enjoy,Bi.

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.

Check your dvd settings, read the manual that came with it. Or you can just pump up the brightness on the tv when watching movies.

Anyways, hope this helps.

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)

If you are getting the same problem with both TV monitors it could then be assumed it's an input problem to the TV monitor. If you are using a digital output from your receiver it could be the cabling. If you are using an analog output from your receiver it is probably coming from the receiver.
Digital video processing does have issues with darker scenes.
Can you try another video source seperate from the receiver like a DVD or better yet an analog VHS, if you still have one. Good luck and let me know.