Ursprünglicher Beitrag von: Robert G ,
Image glitching randomly after boot
Hi, i hope anyone have solved this issue or determine the cause of it. My iMac display suddenly started glitching. (No water damage or physical damage) As i turn on the iMac on boot screen the apple logo can be seen perfectly but as soon as it boots to OS the image goes beserk. [image|1998236] [image|1998235] [image|1998234] As i move the mouse around the image distorts randomly. Its impossible to work. What have i done so far; # PRAM/SMC Reset # Tested an external monitor (same issue also persists) # Upgrade OS # Flash EFI Upgrade # Swap RAM cards # Tested new RAM cards # Tested single slot RAM one-by-one since there are 2 slots # Checked LCD connectors # Cleaned fans # Remove and reapply new thermal paste (Processor and GPU) So far no luck, Hope anyone can help, Thanks in advanced!
iMac Intel 21.5" EMC 2544