評価: 13
2
Late 2012 Imac A1419 EMC2546 after trying to wake it up gave me a cloud of dust as fans kicked in at a full speed and screen is black.Power button works turns iMac off and on but fans keep running at a full after it turns on.Screen is black with no signs of life…after turning computer off i could hear some slow fan running …
…at the moment have a screen removed and trying to find out if some heat sensor giving me this problem ….
評価: 5.4千
23
14
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Try an NVRAM reset (Option+Command+P+R), typically resolves display issues if it isn’t a hardware issue with the display itself: https://support.apple.com/en-us/HT204063
Also try an SMC reset: https://support.apple.com/en-us/HT201295
If that gets the display running, next run Apple Diagnostics, which should show any issues with thermal sensors: https://support.apple.com/en-us/HT202731
このアンサーは役に立ちましたか？
NVRAM and SMC reset did not help,unfortunately....
And yes this happened just randomly...Id say its a hardware issue...
Have you tried an external monitor?
No i haven't....let me try that ! ...need to figure out how though....
And thank you for helping me!
By the way does anyone know what type of LCD thermal sensor is ? Is it resistive ,semiconductor based?
My multimeter is showing as an open circuit or no resistance at all....if it is a resistive then thats it ,found it....at least one problem.....i hope :)
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Is this after completing a repair of some kind, or did it just "randomly" happen?
Jonah Aragon さんによる