There are two common reasons a NAO will not stand up. One of them can be fixed by the customer with a computer and the other requires shipping the NAO for service.

Rather than try to distinguish between the two cases, it is easier to simply attempt the intervention and test the result. Your NAO will need to be connected to a WIFI network or hardwired to your computer, and you will need to SSH into the NAO. We use the program PuTTY for this purpose, but you can also use a Command Prompt.