Changed laptop BIOS boot settings - Black screen

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SilverTelperion

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Jan 19, 2015
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Laptop concerned is an Acer TravelMate P453-M.
Already asked the question on Acer forums, but maybe you guys can add more insight!

I recently had a motherboard and HDD replacement on the laptop.
I wanted to install Windows myself, but the BIOS was set to UEFI, and I couldn't seem to boot off of a USB drive.
So I switched it to Legacy, booted from the USB drive, and installed Windows just fine.

For whatever stupid reason, I went back to try and change the setting to UEFI.
Now the laptop switches on, but refuses to boot. I get a black screen, with no logo or any prompt whatsoever to access the BIOS.


I read a bit and seems I need to remove the BIOS battery, let the memory clear itself to reset BIOS settings to default, and try again?

If it matters, I re-installed Windows 7 64-bit.


Any help would be appreciated!
 
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vegettonox

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Oct 11, 2006
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You cannot switch modes after the installation, windows detects what your boot environment is and configures as such, if you switch after it cannot find the boot loader. You have to configure the uefi bios to boot from your usb stick and make sure its configured properly then you should be able to boot off of it. You will need to install windows while in UEFI mode if you wish to run it.
 
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SilverTelperion

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Jan 19, 2015
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As things stand, is there a way to do that? I cannot seem to access the BIOS settings with F2 mashing, cause literally all I get is a black screen. No BIOS logo or anything...
 
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vegettonox

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UEFI is a little wonky on some of these laptops, hell mine wont get to the UEFI bios unless i hit the F2 key the second the initial boot logo shows up. I am heading into work but if you look through the user manual it should tell you the procedures for accessing the UEFI bios without windows. If you still are unable to locate this, I can give you a hand later tonight.
 
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SilverTelperion

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So if I understand this correctly, a UEFI BIOS is different from the regular BIOS screen? And it can be accessed even if nothing appears to be booting on my device?
 
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vegettonox

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Depends what you mean by nothing booting at all, if the power comes on and the acer logo flashes then probably yes. Let me get in touch with you tonight if you don't mind waiting a few hours, think about 4 hours from now or so. PM me
 
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vegettonox

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Told yah, but you may want to dig up the information on accessing your UEFI bios outside of windows. The normal access is to use the windows sidebar to do an advanced restart for bios access and you boot right into it.
 
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