I own an iMac 5.1 2.16 MHz Core 2 Duo. Boot ROM Im51.0090.B09 Year 2006.
On cold boot up the screen lights up with apple logo then a black screen appears.
I hear the hard drive booting up but cannot see the desktop.
Any Fix?
Paul Ragozin
iMac, Mac OS X (10.6.8), Black screen Appears at boot up
Can you boot it from an installer DVD? If not then Please make a Genius Appointment and take it in for service.
Hello Kappy,
If your asking whether I can boot from an installer DVD; I tried the OS Installer DVD Snow Leopard and nothing happened.
I believe I have a failed video card. Do you agree?
,Paul
You have some sort of hardware failure.
try hitting the on/off button on the back gently, without turning the computer completely off while adjusting brightness down with your F1 key to turn down brightness on your iMac. I have the same issue for over a year, and mine runs fine in lowered brightness mode. I can only use it with 2 or 3 bars brightness, but it does work for me. let me know your results please, if the lowered brightness does work you.
Hello John,
Well, yesterday after I logged off I thought about my problem and searched some of my old mac documentation.
The first thing I did was to hold the power up button down and not let go for about 5-7 seconds.
The front panel light blinked on and off I would say 5-7 times.
Then, I let go of the button while simultaneously depressing the command key and the s cap key.
This action dump me into unix, and shortly thereafter with some additional looking around in unix everything worked just fine.
I did verify disk and repair.
So, that's my tail.
Thanks again
,Paul
iMac troubleshoot black screen on boot up
