As I was working on my 27” mid2010 iMac, the computer froze and its screen changed with strange graphic artefacts.
I shut it down and after a min when I tried to power it back on again, it just wouldn’t start.
When I pressed the power button to turn it on, I could hear the fans starting to work, but after 5secs they stopped.No chime was heard, nor would the iMac boot. Screen remained black.
I have no clue what my next step can be… I’m totally lost, what can i look for in order to know what could be wrong?