661-5305 Logic Board 3.06 GHz for iMac 21.5 inch Late 2009 A1311 MB950LL/A (820-2494-A) Published July 19, 2017 at 350 × 350 in 661-5305 Logic Board 3.06 GHz for iMac 21.5 inch Late 2009 A1311 MB950LL/A (820-2494-A)