Reset bios Dell Latitude E6430 settings.

Hello. I have Dell e6430 laptop and I used it with a connected via ExpressCard slot external graphics card. By default in the BIOS (variable efi) defines the main display (0x1D4 variable) is set to auto (value 0 x 0) and internal graphic adjustment (variable 0x1D8) is also set to auto (0x01). Being stupid enough to think carefully before playing with efi variables that I put primary display to the PCI (0x02) bus and internal graphics to disabled (0x0).

(I had problems connecting to egpu via EC-slot to put in mode gen2 (gen1 works perfectly) - the laptop didn't use the egpu, so I thought that I can 'force' to use egpu playing with variables of the efi.) Don't tell not even, now, I know it's stupid :)

Long story short, that now I can't start my laptop because the internal graph is disabled and egpu also will not work because EC works on gen2 mode.

The question is: have I "brick" my laptop or is there a way to reset the hardware BIOS settings? (I tried to remove the batteries - it did not help)

Here's how I used to solve my particular problem.

I had Flash the bios of hdr file, allowing to check POST, then I started in the EFI shell blindly and changed vatiables to the default values. After that, I got new Flash the bios from the hdr file, because otherwise laptop would not again go check POST.

Tags: Dell Laptop

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