Is my ASA 5505 almost dead?

I just got a refurbished ASA 5505.

It works fine until un need to reload it or unplug it from power and replug it, when I do this and it's warm (even after some minutes of uses, so still physicaly cold while touching it), in this case, it simply reboot in chain withing 1 or 2 seconds. I have to unplug it from power and wait 5 minutes before replugging it to power (maybe to let it cold or to empty the capacitors ?).

I don't know if it's a problem from the power supply (that makes some noise, but I think it's normal), I tried loading more the power supply by plugin in some PoE device (Cisco 7940G) and it works fine, so it looks more like it's a problem on the ASA itself.

I posted a video of it's reboot cycles... and nothing show on the console port.

http://youtu.be/ktZd_6IUYy8

Do you have any idea of what can be the problem ? Must I send it back to the vendor ?

I tried updating the ASA image, but this don't changes anything.

Thank you

EDIT: I also see an orange LED inside.