Wireless part of my router stopped working

[Incognito Noctix]

Hi there.
I was casually browsing some internet sites today via lan connection to my router, when suddenly my friend complained that the her internet connection stopped working (she's using a laptop connected via wifi). I figured it was just the laptop acting up or the modem/router requiring a reset. After troubleshooting for a while, I tried connecting my smartphone to the wifi connection to check if the problem was with the laptop, but that didn't work either.

It seems like the router keeps resetting, as the wifi connection keeps showing up and disappearing again from the "Connect to..." screen.
Am I looking at a dead router here? Or at least just the wireless part of it? Just wanted to hear some opinions before I fork out some cash for a new one.
It's a D-Link DI-524 by the way.

Thanks for any insight.

EDIT: For some reason it just started working again *shrugs*