Originally Posted by echester
Please supply details on the service menu adjustments. Thanks.
BLACK PIXELATION/RANDOM BLOCK NOISE/"WHITE DANDRUFF" FIX
This will require you to enter your xbr1's service menu which is a risky thing. Make sure you feel competent maneuvering through the menu *before* even attempting any changes. If you change a value (either intentionally or accidentally) and want to return to the previous default, press 0 then ENTER on your remote to restore the original setting. *Some values cannot be reset using this method* and in order to reset, the tv must be powered down then unplugged for at least 10 seconds. There really is no way to permanently damage the tv in the service menu (well unless you turn off the cooling fans and fry your ob). If you accidentally change a setting that seemingly kills your tv or causes it to behave erratically don't panic. Again simply power it off, wait a couple minutes for the lamp to cool, and unplug for at least 10 seconds. ...But the statement must be made anyway: ***I will not be held liable for any damages you might inflict to your television, you make any of the following changes at your own discretion and risk.***
The changes involved to improve the pixelation problem are very simple. It seems to be an imbalance of some of the core contrast controls in relation to the core brightness control.
With the set off quickly press DISPLAY - 5 - VOLUME UP - POWER
You are now in the service menu. Slowly press JUMP three times. You should see "PANEL NVM OK" at the top of the screen.
The 2 and 5 keys shuffle through the main categories, while the 1 and 4 keys toggle through the sub categories. The 3 and 6 keys make changes. MUTING + ENTER WILL PERMANENTLY SAVE CHANGES.
First, press the 2 key eleven times until you get to "11 CNV" as the main category. Then press the 1 key three times until you see "3 GAIN_R" in the subcategory. To the far right you should see a "0", if not, we are going to definitely make some changes **(if yours is already zero, see further below).
Press the 6 key until you get 0 (the picture color will be drastically changed but don't be concerned). Press the 1 key once to get to "4 GAIN_G", again make sure you see a 0, if not press the 6 key to get it. Now press the 1 key again and you'll see "5 GAIN_B", press 6 to get the 0. Your core contrast will now be greatly reduced, so we'll have to go to a different section to increase it.
Press the 5 key nine times. You should see "2_WB" as the main category. Press the 1 key nine times to go to "9 SUB_CON". This is your core contrast control. The default contrast setting is normally right around 128 to 132 or so. Press the 1 key once to see "10 SUB_BRT". This is the core brightness control, and its default is normally 128.
If your set required the three gain controls to be reduced to 0, then you will need to increase the core contrast and slightly tweak the core brightness. Use a calibration disk like AVIA or DVE to get it right. Watch some dark programming and enjoy the improved picture quality. When you are satisfied with your adjustments press muting then enter to permanently apply the changes. Power off the set to exit the service menu.
**If your set's gain controls were already defaulted at 0 from the start, then we will have to try a slightly different approach. At the "11 CNV" main category, the first subcategory is "0 CNV_ON" and the default is "1". Press the 6 key once to change it to zero. Navigate to "2_WB" by pressing the 5 key nine times. Press the 1 key nine times to go to "9 SUB_CON". Increase contrast with the 3 key until it is correct. Again, using AVIA or DVE for perfect adjustment. Muting + enter to save changes, power off to exit service menu.
Works for me, should work for you also.