Hello Please BE aware This is tech information service. you are paying for the benefit of my real world experience and can save you time and money
I have had many of these with bad plasma panals
the 8 blinks says SS board
7 Blinks says SY board
so since both are giving you error
it is possible the panal is blown
the only way to know is to replace the SY and the Upper lower buffer
and if they blow right away and they will if the panal is fried
the tv is toast
there have been alot of these i did under warranty that would have been $3000.00 repair
so i shouldnt gamble on buying boards for this.
is there a quick way to test the panel without buying new parts?
and why would the blinks change with the ribbon unplugged form the sn?
because the SN is no longer throwing the error
the other board SS is
and thats what worries me
other than looking very close at the panal for a crack there is no way to test it
and just becuase you dont see one doesnt mean there isnt one
your codes show 2 failures why do boards fail at the same time?
you are going to have to gamble at this point replace the SN (combo Y and buffer board) and see what happens
i will leave this open for a few more days and do some shopping for boards. thanks for the help to this point.