Does anyone know about this problem ? Thanks

Hi there.
I'm hoping to get some help with my problem.
I received a dm500hd from my brother yesterday , he has had it for a few years but never used it.
I used for the first time yesterday and it was working well.
However today I went to turn it on and nothing is working , the only thing that is happening is inside the box there are 4 little Red LED lights permanatly on ??
I have tried connecting via mini USB, ethernet, to my PC but nothing is happening.

Is there a fault with the box ?
Please help
Many thanks .
Dounavilla