Black screen on 2015 iMac 27" retina with loud fan
This question is asked for one of my friends.
He has a 2015 iMac 27" retina system, recently he got the screen replaced, however, when trying to power it on, he can hear the chime sound, but nothing showing on screen, screen is totally black, instead, the fan is very load.
He tried to connect it with an external monitor, it is running and OK, but nothing displays on internal screen. He tried to do SMC reset, no help.
Can any one advise what's could be wrong here?
Thanks for all your reply and suggestions. One more thing to ask, is backlight, either backlight unit or backlight cable, easily damaged when opening the display unit? It looks to me that the adhesive is on all edges, it should be safe just cut off the adhesive itself. Correct me if I’m wrong.
由 Tom 完成的
You must follow the IFIXIT guide here iMac 英特尔 27 英寸 Retina 5K 显示屏更换 make sure you use the tool supplied in the adhesive strips which you'll need before you open the system [关联产品丢失或禁用: IF174-005] and you'll need a few of these as well Plastic Cards I use four just to make sure I don't damage the display which is very easy to do!
由 Dan 完成的