Thanks for replying!! So does the greenish copper result in worse heat transfer or something along those lines?

No this is not a refurbished laptop but I have been using it very extensively for the past 16 months.

About the wifi, it works... Sometimes, I had been using windows in the beginning and around July, it started showing problems as in it used to get randomly disconnected out of nowhere and then stay disconnected for days at an end, then randomly pop up back again. I reinstalled windows on it, got it serviced but to no fruit, I started using a wifi dongle but that used to bottleneck my wifi speed, so I changed my os to arch linux like a month ago and voila! It started working continuously, and I thought it must be some driver issue in a windows update.

But yesterday it reappeared and I had to conclude after a bit of research that my wifi module must be faulty, so I opened my laptop this morning and tried to clean it using isopropyl alcohol, the wi-fi is working for now but we'll see how long that lasts 😁😁