iMac 21.5″ A1311 Backlight Inverter Board $20.00 A1311 – Late 2009 – Mid 2010 – Mid 2011 Select One Choose an optionABCClear iMac 21.5″ A1311 Backlight Inverter Board quantity Add to cart Add to Quote Continue Shopping Category: A1311 (21.5" iMac) Late 2009-Late 2011 Description Backlight Board – iMac A1311 A) Late 2009 – DARFON – 661-5304, V267-701, DFD-4NPG-R B) Mid 2010 – 661-5537 C) Mid 2011 – 661-5976