imac 27 late 2013 black screen until after several restarts

As with prior versions, Windows 3.x exits to DOS if an error condition is severe enough. Windows 3.1 also displays a blue screen when the user presses the Ctrl+Alt+Delete key combination while no programs were unresponsive. Windows 3.1 changed the color of this screen from black to blue. Windows 3.0 uses a text-mode screen for displaying important system messages, usually from digital device drivers in 386 Enhanced Mode or other situations where a program could not run. It is not a crash screen, however upon crashing, Windows 1.0 either locks up or exits to DOS. In the final release (version 1.01), however, this screen prints random characters as a result of bugs in the Windows logo code. Windows 1.01 Blue Screen of Death: Long version, showing installation DOS 6, Windows 1.01, and the failed startup of Windows 1.01īlue error screens have been around since the beta version of Windows 1.0 if Windows found a newer DOS version than it expected, it would generate a blue screen with white text saying 'Incorrect DOS version', before starting normally. Windows 1.0 BSOD (Incorrect DOS Version): Short version, showing a failed Windows startup

The 'Incorrect DOS Version' screen on Windows 1.01, featuring random characters

Imac 27 late 2013 black screen until after several restarts