Should a Player who disconnects and returns be punished?

So recently, I've become more aware of an issue that comes with playing ranked. Now, as we all know, going afk during a disconnect means that it is automatically counted as a loss, receive a D-, and no opportunity to be honored, now while this is all fair. I do wish to pose the question. Should I player be punished if they disconnect, come back, and help their team to win the game. This was brought to my attention in around november, I was playing a ranked game, when all of a sudden my PC decided to shut down. No reason. No warning. My PC was charging for crying out loud. There was no indication that it should ever stop working. I got back on about seven minutes later, anxious to do my part for the team, of which I feel like I did. Excited to see how close I was to bronze promos, I checked my ladder ranking. It went down. Along with my hopes of making my last minute climb to silver after a fiveish game (six including that one) winstreak "That's not fair," I thought. But alas, I figured it was okay. Today, three months later, something similar happened, my PC tabbed out, letting me know that I needed to charge my PC. I plugged my PC in, it made the sound to indicate it was charging, then, about a minute later, without warning, it shut down. Aware of the consequences, I still got back on and continued to finish the game, and helped to turn the game around from a pretty bad scenerio. It's bronze. That stuff can happen. Here's the thing. My team, this time, AGREED that I should get points. They thought I had done enough of my part to be rewarded. Now am I saying that all people who disconnect and come back should be rewarded? I think so, after all if they come back it clearly wasnt of their own volition that they left in the first place. They're STILL trying to do their best for the team. One can go 0/14 on accident and not be punished, but if one has a three second power outage? Something COMPLETELY outside of their control? They come back in and make the game winning play? Doesn't matter. There goes their promos. No matter what their kill count is at the end of the game, no matter how many objectives or how much CS they got. Doesn't matter.

Sometimes life just happens. I don't think its fair to punish the people who are trying to do their best. As much as it sucks to have disconnects on your team, it sucks just as much to be the one who disconnects and is now shut out from any type of reward. Some may argue that it definitely shouldnt happen in all games, say someone gets back three seconds before the enemies' nexus explodes. While I disagree with that, as they're still trying just as hard as the person who went 0 and 14. I DO have an alternative suggestion, maybe there should be a CS point, or a KDA requirement to get credit. I don't want to say an amount of time back in the game because that just doesnt make sense. If the total time required is lets say 20 minutes, theyre in for 17, have to relaunch, come back in and the game is 3 seconds from being over, even if you took an inhib you don't get credit. TIME is not the same as CONTRIBUTION. Riots whole thing is try your best, and if you win, you get the rewards. But I did my best, I was able to help fix the mess that was created, and I received fruitless results