Xbox one power button blinking fast and making an annoying clicking sound

I have found a fix!

The knocking is due to a dirty ribbon cable behind the faceplate.

Press the connection button on the left side of the Xbox by the USB port and you will hear that "knock" and the same flashing will appear. That knock is from the speaker, I originally thought it was a HDD problem.

More than likely the ribbon connection AND the spot behind that little button on the side are DIRTY!!!! The dirt is causing it to spasm out. If you're under warranty send it in just in case something else happens. If you're well out of warranty like myself
and don't want to spend $100 for a "cleaning" look up a tutorial to get the faceplate off and really really clean the cable connector and the spot behind the little button. IT REQUIRES THE ENTIRE OUTER CASE TO COME OFF AND YOU WILL VOID YOUR WARRANTY IF YOURE
STILL UNDER ONE!

This just happened to me tonight, my Xbox was manufactured October 15, 2013 and it had never been opened before tonight. The problem is gone.

Hey there CloudLXXXV,

It does sound like there may be some underlying hardware issue going on and you might want to reach out to the Chat and Phone teams for a closer look at this. Contact Us

Some different things to try with this would be sure that the console is in a well ventilated area:

Ventilation for the Xbox One S and original Xbox One console

Also ensure the console is plugged directly into a power outlet versus using a power strip or surge protector. Since the Xbox One console has a built in surge protector, sometimes weird issues can happen like this if those are used, so it's not recommended.

About the Xbox One power supply

is it bad? Mine started doing this today. Just wanted to know if it's actually bad or is it just irritating

mine just started this today so its nice to know the cause of it

Hey Mine is was doing this for a long time, I did some digging to find it was a HDD problem. I would suggest Contacting the support.

support.xbox.com/.../contact-us