GoKawiilBlogger Finds Soldered RAM Failure Unfixable on Lenovo X1 Carbon
A blogger running a Lenovo ThinkPad X1 Carbon purchased in 2021 reported browser crashes and BTRFS filesystem errors, which memtest86+ testing traced to failing RAM. Because the laptop's memory is soldered directly to the motherboard rather than installed in replaceable DIMM slots, the faulty RAM cannot be swapped out as it could on older machines.