The SONY authorized tech repaired my KDL-46VL150. So far it has not shut itself off and gone into the recycling 6 flash blinking LED mode. The tech replaced the DN1 backlight power supply board in the upper left corner of the chassis when looking from the back. There is also a second nearly identical board on the right side which was not replaced. The tech was very vague on what these boards do and how their function is divided in powering the backlights. I did notice that after installation there were about 1 inch wide shadows running vertically along the left and right edges of the screen. They are not severe but still noticeable to a discerning eye. I pointed this out to the tech and he, of course, said "What lines"? I have searched this forum and have found this phenomenon mentioned before:http://www.avsforum.com/avs-vb/showp...6&postcount=75
(This is not the obvious letterbox cropping that SONY talks about on their support page)
So may I ask the following questions:
1) Does replacing this power supply provide a long term fix that will last a normal expected life (of many years)?
2) Why are not both power supplies replaced? The tech made some comment about the other power supply being on long back order list (but not for my repair) He already had this part with him before even checking the error log on the Bravia, as if I was getting this part regardless.
3) Does the dimming on the edges reflect a power supply set for lower output and hence prolonged life (while still keeping the latent defect and possible future failure)?
4) Does anyone have a good handle on this backlight/power supply issue for this subset of Bravias?