CB715-1W-30JY Acer Chromebook C715 not charging

So I have found on my USB-C charged laptops that the plug needs to have just a little bit of tension when in the socket to get good contact. I do that by giving it a half twist when it's plugged in. Your system wants 45W of charging, and the phone type chargers are typically 10-15W, so that would make sense that you need two of them to do much of anything. Try using the stock charger with a twist on the cable to see if that helps.

I assume you have tested on both sides? There almost has to be something wrong with the charging circuit, except that you said you could charge by connecting two phone chargers… I'm stumped.

I can't image any scenario where it would accept a 10W or 15W charge, but not a 45W, 65W or 100W charge. I admit I'm not deep into charging circuits, but… I wonder if it might be a voltage thing? The stock charger, and any charger that outputs enough current, is going to do it at 20V, the phone chargers are at 5V.

That's kind of what I'm trying to say… Any charger that meets spec is going to provide 20V@2.25A or higher. The phone chargers that seem to be working, albeit slowly and doubled up, provide only 5V. That seems to be the biggest difference between the two. If there were something wrong in the charging circuit that, for instance, tripped a internal breaker at 7V, the 5V chargers would do something, the 20V chargers would do nothing.