So about a year ago I made a post asking for help as I had a 2-3 flash on my Dell Optiplex 3010 when I upgraded the RAM.

I found that 1 of my RAM slots had died and it didn't make sense to me. I bought a new i5-4590 and replacement board for cheap and all was good. Today I made a small CPU upgrade to a i7-4770 and now I have the same issue RAM Slot 1 when a RAM is in it gives me a 2-3 flash. Any idea how to fix??

As I don't want to have to buy yet another motherboard