Sometimes screen goes black upon startup, looks like going in sleep mode
Sometimes upon startup the screen lights up normally, but after one or two seconds the screen goes totally black, but the iMac still starts ok. I can hear the bong sound and the hard drive working.
Sometimes just before the screen goes black, it very slightly blinks, then goes black.
Wait that start up process is finished, then press the power button once, wait 10 seconds, and press it again, as to put it to sleep mode and back. Then the iMac works perfectly.
I suspect the power button, as it doesn't have a frank feeling when pressed, it feels a bit sticky, as compared to other iMac.
So I was wondering if there is a way to replace the power button ?
Regards from Montpellier (France).
Is this a good question?