HP PE4240N vertical lines

[bklein]

I have a HP 42" plasma that failed after a power outage.  It has snowy colored vertical lines for a picture (photo attached) (blue with white stripes for channel numbers for setup screen).  I read that the YSUS and Y-drv top and bottom boards all need to be replaced for such a failure.  Please comment, as that is $4-500 worth of boards.
Part numbers of those boards:
6871QYH029A
6871QDH066B
6871QDH067B

Barry