Chromebook Acer C720P not turning on

I'm having this same problem. Will try this "super secret button" fix. This is an older thread, but I'm wondering if Sunil solved this problem and if so, which fix worked? Thanks!

I have since tried other things besides tape to keep the small button pressed (sponge, bits of plastic, etc.). Finally, I just removed everything and let the button press against the back plastic cover (as intended) and without screwing screws back in place, the c720p seems to be working okay now. This has been the longest stretch without power loss in a while. So, to say the least, it's a very finicky little button. Who put it there? I don't know... it's very odd! I can't find any info. online about this small part.

I didn't have any luck with taping the button down on my C720p. The right blue light is on only while plugged in and I thought it was charging but now I don't think so. Tried a different charger and a new battery. It probably needs a motherboard as Alexander Somma mentioned below

It won't work to tape the button down because the button is very sensitive and the tape doesn't have enough tension to hold it down once you let go. I'd recommend wedging a ball of tape in there so when you close the case, it forces the button to be pressed. The blue light should be on if you'd done it correctly.

The "super secret button" fix works for me! I manage about sixty of these Acer C720s and during the Fall and into January, I've had about five suddenly exhibit this power/charging problem. I was keeping them for parts until reading this thread and presto depressing the "ssb" fixes both problems. You can cut a very small piece of metal foil tape used in HVAC ducting to press and hold the button. Be careful not to overhang on the pin side of the switch or you may short circuit the incoming wiring. The foil tape is very sticky and rigid stuff. I use it judiciously to secure the battery where mounts have broken as well. Thanks for your post on this COREDESIGN! I would NEVER have found this on my own.