Led 3 &4 off no chime
2010 iMac no chime led 1& 2 on 3& 4 off and no chime
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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:
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Hi Mayer, I do have the same problem, no chime, led 1 and 2 are ON, led 3 and 4 are OFF. My imac size is 21.5 inch and EMC No is 2389.
Sathish see update to question
