I bought this refurbished T480 from Amazon about 5 months ago, expecting better quality control than eBay sellers, especially since it was priced 25% higher than the used market. However, after just 3 months, the screen began flickering intermittently with purple static moving downward.I chose the T480 for its upgradability, but when I tried to install a backlit keyboard and add RAM, I discovered the screws were stuck, making upgrades impossible.Given these issues, it seems the refurbisher either cut corners or failed to properly inspect and test the device before reselling it.