While my bet is some BIOS setting, I've had to hold down the escape or such key and power up, never letting up on the key till I see a menu.
This varies with make and model and since I don't own your model I can only share this old tech tip.
Hi there, new to the forums. I recently replaced the HD in my Dell 7720 17R SE laptop. I ran my recovery sw, reinstalled Windows 7 and all necessary drivers/utilities. The laptop is working amazingly well, very fast, no glitches, etc. However, I no longer get the Dell logo on startup. Instead I get a black screen with RAID and ctrl-l options, after about 5 seconds this goes away and the laptop continues to load into Windows as normal. As a result I don't get the normal F10 F12 boot options. I can force the laptop into BIOS options by continuously hitting F12, but it does not respond consistently.
Any info would be greatly appreciated, thank you