Bypass laptop power jack

So... A user at my office dropped his laptop square on the USB-C charger whilst plugged in. So naturally, the laptop no longer charges. Well kinda, if i leave it plugged in for like a week it gets to around 30%. I have inspected and replaced the charger and cable itself. No change.I stripped the laptop and physically inspected the port, connectors and double checked all connectors leading to and from the battery. No visible damage. I then sent the laptop to a repair center. They quoted R13 000.00 for a motherboard replacement. This is R5 000.00 short of the laptop's value so the company decided to rather buy a replacement and allowed me to take it for myself.

It's a Lenovo ThinkPad E590 (i7, 16GB RAM, 500GB M.2and not too bad at all if I can hack-fix it myself.

So if you are skilled enough to help me on this, I would REALY appreciate the assist. It has been a while since I had the opportunity to have a decent-ish system at home.

So the way I see it, there are two options. One is to try and fix the charging fault itself and Two is to bypass the problem completely.

Fixing the charging gives me 3 challenges. The first is to isolate where the issue is. Now I watched some videos on YouTube and it looks like the "handshake" might beat fault due to the charging happening but never ramping up to full throttle. Is that a physical chip that I can replace, repair or bypass? And how do I know if that is the location of the fault? Then, how do I fix it. Some next level fine soldering I presume but i'm up for the task. Or maybe a way to charge the battery by bypassing the port and board entirely whilst having the laptop running off it? Even if it would then need to be a fixed cable, at least I keep the ability to charge it and run it off the battery. Like a PC on a UPS.

Bypassing the problem completelyalso sounds like a possibility even if I would lose the portability of a laptop. I'm talking about powering the laptop board directly without going through the battery. In this case I would probably end up building it into my desk as a silent Small Form Factor hidden PC and make the screen like a pop-out monitor. So if this is the only way, can I power the board directly? And how do I go about it?

Please comment if you know something about this stuff so I don't ruin my chances with this laptop.