Jesus Christ GBATemp can be infuriating sometimes. Guys he isn't asking how to hack the console. He isn't asking where to buy a chip. He is saying that he has successfully lunched CFW. Are people not capable of reading the OP before replying?
To OP: What do you mean by "V2"? V2 has meant several things over the years. Initially it referred to iPatched consoles, later it referred to Mariko consoles. Even with iPatched consoles there is variety as Nintendo actually patched the exploit in two different ways depending on the hardware.
It can not possibly be a Mariko. Fusee was fixed in the Mariko bootrom. If you can launch CFW through Fusee you have an Erista. This can be easily checked by looking at the back of the console. It baffles me that no one has suggested this yet.
Look at the area I have circled in red. If it says Hac-001 then you have an Erista. If you have a Hac-001(-1) then you have a Mariko. This is of course assuming the backplate hasn't been swapped, which it sounds like it hasn't since your friend only used it a few times.
What likely happened is Nintendo were using up old SoC stock so consoles which were patched were being manufactured at the same time as consoles which were unpatched depending on which factory made your console, or your console had a hardware defect and instead of yeeting it they put it aside to be inspected and repaired by an engineer. By the time the engineers got to your console a number of patched consoles had already been produced which messed with community collected data linking serials to hackability.
Either that or the serial number is wrong. The first few letters of the serial number actually mean something, it's not just random crap.
https://switchbrew.org/wiki/Product_Information#Prefix
Given on OG consoles that the serial number is attached to the faceplate I find it exceedingly unlikely that it has been swapped with a different console as it's a lot harder to swap the face plate than a backplate. Just in case you can verify that it matches the hardware serial through the settings menu. If it has been swapped then your friend probably gave you a second hand console and didn't tell you (or their parents bought them a second hand console and didn't tell them).