(This can be done without any issues involving firmware password)Ĭlearing NVRAM by holding Command-Option-P-R. While off and the light is orange, hold down shift+control+alt/option and then after holding those three keys hold the power button a moment and release and watch the light change from orange to green to orange again. This works best without 100% battery, because the light will be orange when charging and the computer is off. Lets ensure you are indeed resetting the SMC. I recommend doing this after steps 2 + 3, but remove cables first. Try booting again with holding option to select a disk. Remove all connected USB, HDMI, or other plugged in devices including power cable. However I think I might have some attempts here to help you out.Īll boot-up key combinations can be seen from here: It honestly seems like you have already tried everything a genius bar would try themselves.
I can then login do a backup and wipe the drives Command F1 mirrors the main login screen to the external monitor. I unplugged from power and plugged in some spinning-rust hard drives to sap power.
#MACBOOK PRO SCREEN LIGHTS UP BUT NO PICTURE FULL#
I didn't do it properly, and it did work, eventually.ĮDIT2: 1) you don't want a full battery for an SMC reset. don't feel like buying a new board.ĮDIT: it needed an SMC reset. My guess is, hardware issue, Genius Bar time? I hope not. On the external, it shows the apple boot screen, the progress bar gets to about 40% across, then even the external monitor goes black. Safe boot, boot to recovery, verbose safe boot, nothing happens. It seems that the backlight is working - it's "LCD black" black, meaning it's not truly dark it looks like the backlight is working. I've tried zapping the PRAM, (ahem, NVRAM), an SMC reset, nada.
Now it won't do anything on boot - the MacBook screen just comes up black. While watching videos, the screen just cut to black.
0 kommentar(er)
