I've been having issues with my DIG-220 sc36. It started with low salt despite salt over 4000. I ran a slew of tests from swapping sensor cable/power cable. I finally called a tech rep at $95 and he swapped display board with a new one and that was it. The new card worked fine but he also told me the rear board looks like its going to go in the near future. I send my display board to a friend in Colombia for him to get it tested and all tested ok. I got the board back and I still get the check system light but now the digital display does not light up. My dilemma is do I spend the $400 on a new board and know that in 2yrs I will also need a new cell and possible the main board which is $500-600 now making the cost 1k. Should I sell this on ebay as spare parts and just buy the swimpure at $800 for the 25k cell and try my luck there.