Power off the computer and hold down F2 key and power on the computer release the F2 key soon as you computer enter the BIOS setup utility. if this wont work try below suggestions.
- Turn on (or restart) your computer.
2. When the blue DELL™ logo is displayed, you must watch for the F2 prompt to appear.
3. Once this F2 prompt appears, press F2 key immediately.
The F2 prompt indicates that the keyboard has initialized. This prompt can appear very quickly, so you must watch for it to display, and then press <F2> key. If you press <F2> before you are prompted, this keystroke will be lost.
Also try F12 key to boot computer with one time boot menu. Restart the computer. Press F12 key immediately after the DELL™ logo appears.
Edited by FreeBooter, 13 June 2016 - 04:07 PM.