For the first time....really ever thta i can remember, my computer went into a hard freeze. So i press the restart, and then the siren starts going EEE-OOOO-EEEE-OOOO so i quick hurry and cut the p/s and then i wait a few seconds and restart and it works fine.
my nf7-s did that on start up when it was new, before I updated the BIOS.
In my case it was the hardware monitor warning because of misidentifying my Barton 2500+