Answer to: Overheating - I think?there are two tiny screws at bottom of monitor twards the center, remove then seperate back from frame, then clean and put back together.replace power supply while ur there
Answer to: How easy is this to open? Just want to clean dust out.its really not that bad. i thought it was gonna be a nightmare for me to replace the cpu fan. being a windows person, but it was cool. just dont be nervis, just relax and read the book on how to seperate the imac. i love repairing these now, its fun.