CIao belli, sul post straniero ho trovato un link a questa pagina che mi sembra interessante : (presa dal sito sony)
http://esupport.sony.com/perl/compatibility.pl?comp_project_id=9&mdl=KDL40XBR2
..potrebbe essere interessante
BRAVIA® HDTV™ Software Update
The Sony BRAVIA line of flat-panel LCD televisions reflects our commitment to the highest picture quality standards. The BRAVIA televisions have received exceptionally high ratings for picture performance from many well respected home theater sources, including the Editor's Choice Award from CNET™ and critics at Sound & Vision Magazine.
To achieve this high level of performance and picture clarity, Sony uses a very bright backlight setting. This helps deliver the brightest picture possible, as well as exceptional picture clarity even in the darkest image sources.
However, the setting, under certain dark viewing conditions, especially blank screens with no video source, may cause the screens on some of these televisions to exhibit slightly uneven uniformity. This condition is not usually visible under typical viewing conditions, such as watching movies or television programming, and generally should not affect your viewing experience.
As part of Sony's continuous quality improvement program, Sony has developed a software update for your television which may further improve picture uniformity when receiving very dark image sources under dim lighting conditions. The software update was factory-installed in later production units of your television model. This software update can be installed via a USB Self-Service Software Update that Sony is offering to ship to you at no charge. Please note that this software update only addresses very dark or no-input scenes and normal television viewing will not be affected or improved.
Only a limited number of televisions left the factory without the software update installed. All others have the software update factory installed.
All terms of your Sony limited warranty continue to apply.
If you would like to order the USB Self-Service Software Update for your BRAVIA HDTV, by March 31, 2008, please follow the steps below.
Step 1 - Enter Your Serial Number
Please enter your Serial Number:
Step 2 - Check Your Television
To determine whether the software update was factory-installed on your television, click the "Check Now" button.