Lenovo 7515, 7721, 7715, 7774, 7706, 7719, 7749, 7799, 7773, 7705 Post Error Message Description/Action

POST Error Message	Description/Action
Press TAB to show POST screen	Pressing the TAB key permits the user to
	toggle between the default POST display
	screen and a custom POST display screen.
Error: Non-System disk or disk error	The BIOS was unable to find a suitable boot
Replace and press any key when ready	device.
	Make sure the boot drive is properly
	connected to the computer.
	Make sure you have bootable media.

78Hardware Maintenance Manual