Hi folks, can anyone help with an iMac problem please?
Mid 2010 27" , keeps randomly going to a black screen. If you click the power button a couple of times it comes back on.
If the brightness on the screen is turned down to 1 or 2 bars, it runs without a problem whatsoever. Then with brightness back on it will go to black screen again within the hour.
When the screen is black, a torch shone into the display shows the system is all still running, image is there. Videos etc keep playing.
Resets have all been done. Then fresh sierra install, then backlight inverter changed, ran for 3 hours then when black again.
Any help would be much appreciated, thanks!
Comments
Take a look at this, apparently thre was a graphics card problem on the macbook pros of that time. Maybe it affected the imac too. Looks like apple might repair free of charge!!!
Try looking in System Preferences -> Energy Saver and see what the "Display Sleep" time is set to.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
these sort of issues are a process of elimination
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
My gut feeling is the LCD panel ... or rather the backlight in the LCD panel .... more specifically the connection to the panel which is a surface mount connector who's joints go bad and sometimes come away completely
Peel back the tape and look at the connection on the bottom left of the panel ...... don't work on this machine plugged in as the SMPS is un- insulated at mains potential just behind the LCD panel