Gateway modem/router will not turn on

My gateway will not power on. I have already tried unplugging, waiting, and plugging the power back in at both the outlet and device multiple times. Same for the cable. The outlet is able to power other devices so the problem is not there. The wps button on top also does nothing. No indicator lights are on or flashing. Xfinity app confirms no outage in area.

Not the first time this has happened. Anytime there is a power outage it is a real coin toss if the gateway will decide to power on again. Despite reaching out in multiple ways, I have not recieved any clear answer on why it does this or how to fix it when it does. 

It has now been over 24 hours since an afternoon storm caused my power to flicker and knocked out the gateway. I have tried "unplugging, waiting, plugging back in, and waiting again" multiple times for various lengths of time, the longest being overnight. Still no results. 

Since the restart was unsuccessful, the Xfinity Assistant wants to set up a tech visit appointment, but the earliest they can come is in 2 days. If anyone can help resolve this so I'm not without internet for 3+ days I would greatly appreciate it.