I purchased my Google Pixel (first generation, regular (ie: not XL)) about a year and a half. It's been rooted for most of that time and I recently updated to Pie. When I woke up this morning I found that the phone had restarted on it's own. After a few minutes I noticed that it was running slowly and, eventually, to the point of non-responsive. I forced the phone off (held the power button until it turned off) and turned it back on. It seemed to load okay, but a few minutes later the phone was off again (which it did on it's own) and I cannot turn it back on. Holding the power button doesn't do anything and plugging it into be charged doesn't show any indications that the phone is charging. I haven't installed anything in at least a week and until this morning I didn't notice any problems with the phone. Any thoughts as to how to get the phone back on and what the problem might be?