I have upgraded my imac from 8gb ram to 64 ram and the hd to ssd hard drive…. after finishing all the instructions I have replaced everything back as it was but unfortunately the screen is totally black and I can see nothing on it… so I thought I might have done something wrong so I have to try again to reconnect everything but still the same … then I connected it to external monitor and it worked just fine… but with the original screen everything is black… so I tried to change the LVDS cable as in one article they have said it might be ruined and still facing the same issue…. I have even placed the old RAM and still same … do you have any suggestions to solve this issue…
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