-------- Originalnachricht --------
Betreff: [coreboot] Re: Installing coreboot with SeaBIOS
Von: Sam Kuper
An: coreboot@coreboot.org
Cc:

On Sun, Jan 16, 2022 at 06:43:42PM +0100, bernd1-1@web.de wrote:
> It's a ThinkPad X220 (notebook version, not tablet version).

The X200 may not be quite the same as the X220, but this guide should at
least give you *some* idea of what's involved, on the hardware side.

https://libreboot.org/docs/install/x200_external.html

> What are PSUs?

Power Supply Units. In the case of battery-powered devices like phones
or laptops, these may also be called "chargers".

PSUs for computers typically take mains voltage (220V AC, for example)
and convert it to the relevant DC voltage.

Your X220 probably has something like a 20V DC PSU.

Most Raspberry Pis need 5V PSUs, same as most Android phones.

If you use an external monitor for the Raspberry Pi, instead of SSHing
into it, then you might need a PSU for that monitor - although these
days, most LCD monitors have internal PSUs and so just need a mains
cable.

I must say, if you are unsure what a PSU is, then I would recommend
reading some basic electronics textbooks - and familiarising yourself
with the dangers of using incorrect voltages or polarities, the dangers
of static discharge, and the dangers of electrocution - before you
attempt to do anything relatively advanced and delicate like flashing
the ROM chip of an X220. Using a PSU improperly could brick your
laptop, start a fire, or worse.

So, please take time to understand the principles well first of all.
Then, after that, you would stand a better chance of doing a good job of
flashing your laptop.
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