Chosen Solution
2010 iMac no chime led 1& 2 on 3& 4 off and no chime
Generally this is a GPU failure. Please give us the size or model number of your Mac, information is located on the bottom of your stand. UPDATE 4/25/20 Time to replace or attempt repair of your GPUcard: iMac Intel 21.5" EMC 2389 GPU Card Replacement
