what to do if my xbox 360 hard drive is disconnected while its running and I get 3 red rings?
You should switch off your Xbox when it shows 3 red lights. The hard drive disconnected while its running is not the reason for the reds lights. The red lights show because the Xbox has over heated.
Take it to an expert if they can't help you can't fix it sorry
It's the red ring of death.... Uh oh
I had 3 red rings before and it isnt the ring of death the power supply isnt plugged in fully in the back just unplug and replug it and power it up and you should be fine