imac leopard doesnt boot

[samihamzeh]

Hello everyone can anyone help me with this problem it is driving me crazy.
i removed the windows partition from my mac and gave the space back to the leopard using boot camps assist so i restarted my imac and it doesnt boot it says :no bootable device -- insert boot disk and press any key.
so can anyone help me and i tried different ways to boot nothing happenes

 

[DeltaMac]

If you boot while holding the Option key - you should get the boot manager screen. That should show you an icon for any bootable drive/partition.
Do you get an icon for your OS X partition?
Click on that, and it should boot to OS X.
When you are successfully booted to OS X, open your System Preferences, then Startup Disk. Select your OS X partition there, and your Mac should then restart properly to OS X after doing that.