Thinkpads Forum

Having replaced the mobo on a carbon x1 gen2 , on boot i get some beeps , 'unrecognized machine type' and a few other such errors.
I downloaded a lenovo bios .iso for my model (20A7) and converted it using 'geteltorito' such that i can now boot with it and attempt to set the machine type; however this doesn't
seem to stick, and my changes are ignored.

My question is should I go ahead and update bios (currently listed as bios rev 1.22, smbios 2.7 present) ?
A friend issued a dire warning that a bad bios will brick the machine, which is dear to my heart.
Finally can this un-entered machine type be causing further problems (I have an inoperable usb and headphone jack ) down the line?

I am runnning ubuntu 14.04 fwiw.

Try this: http://www.computing.net/answers/hardwa ... 92785.html

my stereo jack and left usb don't currently work - can this possibly be related to not having the machine number/type defined in bios?
i replaced the motherboard and now dont have those defined. to do so i apparently need to boot to windows and update bios, but i haven't had the nerve to try having been warned that a bad bios can brick the laptop

this turned out to be a hardware issue, the ribbon cable from usb/sound module to the motherboard was not seated

I don't believe the people which say, 'bad bios can brick a laptop'.
What people mean by 'bad bios' is (usually) the incorrect or an incompatible version of bios.
If you put the wrong version of bios onto your bios chip, your computer won't know how to initialize
itself - it'd be like putting a key into a car but the key wouldn't know how to start the motor, the motor and car would be fine and fixable. It's the same thing with the bios, fine and fixable.

There are lots of videos online of people flashing their bios chips with a 'programmer', which is a single board computer connected directly to the bios chip. The single board computer copies the correct version of bios onto the chip and you're computer it back to life.

I'm not 100% certain this would work with a machine as new as yours namely because Lenovo may have included some mechanism to make such an innocent process complicated.