Windows 10: Messed up Bios settings. Please help

I Changed BIOS OS mode selection setting from CSM to "UEFI and Legacy." Now laptop boots to blank screen. No bios splash screen. I hear the optical drive being recognize and the fans turn on. Fans intermittently speed up and slow down.

Samsung NP365E5C-S05US with Windows 10 Pro 64-Bit installed on an SSD. Bios version P07ABF.
-unplugged ac adapter and battery, pressed power button to drain system, reconnected and still nothing
-tried putting a windows 10 pro, 8, and 7 installation disk in. I can hear drive spinning but still blank screen
-tried f2 f8 f12 at start up but no response
-popped out ssd and tried rebooting, nothing


I made a stupid mistake. Guys please help me!

:)

 

Messed with Bios settings. Please Help

I would imagine Samsung would be the ones to call for advice and where a service center was in your area ?

Seems you changed Secure boot options not CSM options

CSM would either be enabled or disabled.

 

Messed with Bios settings. Please Help

You'd have to remove the mother board battery for a while

You might also need to ask the manufacture on how to reset the cmos if removing the mother board battery does not do anything.

Also maybe holding down the ctrl key and tap the esc key ?

 

Remove battery from computer .. NOW press and hold power key for 15 seconds..
Put the Battery back and now try to open BIOS .. using F2.

If no go contact Support.. u may need a new motherboard.

Que: do you see or samsung logo when computer powers on.. or any other symbol such MOBO brand

 

Remove any usb devices, remove power cord, remove battery incl cmos battery, press & hold power button for 15-20 seconds then plug batteries back in & turn on. Some say wait 30 minutes after releasing the power button before plugging everything back in so you can try that also if you wish.

 

Are you sure you're tapping the correct key for the bios ? When you turn the laptop on tap the F2 and see if the bios screen come on ... Also, can you try hooking it up to another external monitor, does it have that option ? You can also try tapping the F4 key when turning it on and see if the recovery options comes on , that would probably reset the unit to factory setting, the way you got it the first time you turn the unit on ( W8 ) If all else fails you probably going to have to dismantle the unit to get at the CMOS battery . You should search Google whether there is any YouTube video in how to remove the CMOS Battery

 

On some model of samsungs if you remove the cover for the memory modules there are two little solder points that can be jumped with a piece of wire or a paper clip bent in the shape of a "U". This resets BIOS for a forgotten password, I don't know if it resets BIOS or just the password. There are several youtube videos showing how this is done. Not hard to do and doesn't take long.

LINK to Youtube list of how to's.

 

F10 ? or ESC ? on some Samsung

I also read popping the HDD/SSD like you did after doing the CSM change let some people back into the bios

and there is this post too about multiple keyboards:

I can’t access the BIOS setup using F2 key on Samsung NP270E5V laptop - Super User