Monitor doesn't stay on.

Question

I have a Proview MA-982KC (Unbranded) 19 inch tft monitor. It's about a year old and now won't stay switched on. It's like the power cable doesn't stay in place so I think it's a loose connection. However I can't get the case open. I don't want to force it.So what I'd like to know is, how do I open it and if I do how easy would it be to fix.Thanks!