Hi there, before you'll try a high complexity surgery with your device, please try this, it’s free and super easy... I've found that I can fix easily this issue installing Macs Fan control free version. The problem of display ghosting is related directly with the internal temperature of your device. You've got to install that application and play arround a little with it and in a few hours running on to a high RPM velocity you'll suprised that the ghosting will dissapear, you got to be a little patient. When you check that ghosting finally dissapears, next you'll have to find for a RPM range that best fits your device performance in order to run the fan system smoothly silent and without this ghosting image. I will never buy a Mac's again there are really beautifull but always has serious problems with their hardware. I’ll be glad to hear if it’s works for you too, Cheers from Argentina!!