Could be an unhappy coincidence, but did you install an app just after the parts replacement? Typically battery drain is app/setting related (mostly app). Can be a dev screw up or malicious. You can check your battery usage by app (1) Open Settings and swipe down to tap on Battery. (2) You can choose to view battery stats from the last 24 hours or last 10 days. (3) Swipe down to view battery usage by app. Check to see what is running . If you find something running in the background you feel you don't want, turn it (them) off and see if that improves your battery life overnight. If it's a 3rd party app, report your issue to the app author.

There are several places you can find replacement parts. The vendor (HP) is the best, but there are 3rd party companies that stock some of these. Unfortunately, this site will not allow me to place links for some reason, but I've found several sites such as Amazon, laptopinventory.com, etc.

Is the ethernet port is part of your board? If so, you will need to get the schematic of the board itself and if your are good with a soldering gun and know what you are doing, yes you can replace the port as it is soldered to the board itself. Make a mistake, get a new board. Risky Honestly, getting a seperate card would be the way to go if you're board is working fine outside of the Ethernet port. Especially if it's a high end board.

Could be the charger. Without much information, did you try another charger? A different USB cable? My controllers charges fine on my Nintendo Switch port and my phone charger. I'm thinking your controller is fine simply because it is charging with the PS4… Update (01/13/2020): So I ran a couple of tests with two of my older Samsung charger bricks (one from my old S4 and the other from my Note 10.1 (2012 version). Input is .34A and output is 2A on both. Both chargers charged both of my controllers with no issue. I also ran my rapids charger from my S7 (.5A input and 1.67/2A output) and it charged them fine. Now I also put them on my portable battery packs of 1000mA. No issue. Take it as you will, but I had little issue charging my controllers.