Join Date: Oct 2008
Location: Only the NSA knows for sure
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I've got the same problem with a KDL-26XBR1. After a lot of research, it is usually either one of three things. The t-con board went and needs to be replaced. Or the panel itself went. Or an issue with the LVDS cable connection (or the cable itself).
T-con boards can be found for not much money. The panel? Not worth replacement.
In my case, I replaced the t-con board with no change to the problem. The LVDS cable seems fine. So, it might be the panel (unless I got a bad t-con board).
(On a side note, I also have issue with no controls working except for the off/on button on either the remote or the tv itself. e.g. volume cannot be changed, usb connection no longer works, cannot access menus, etc)