Could you help me find where to get the firmware/software and how to load it into the program?
I download mine from Navifirm+ (
http://www.symbian-toys.com/navifirm.aspx) as you cannot do that anymore on NCS anymore. Download that software. Then, just select your phone RM-number and firmware number and download them. Be sure to tick everything/download all files. It will take some while, and once it finishes. Move the downloaded files to "C:\ProgramData\Nokia\Packages\Products\RM-XXX" (rename XXX to your phone's RM number). You cannot access the ProgramData folder without typing it, so please type it.
With that, the firmware will be recognised when you click on Refurbish.
But first, can you let your phone charge for at least 10-20 minutes? You said that your grandpa flipped the switch off so it didn't charge right? Just give it some juice at least. I know the phone will turn on and show that failed splash screen, but that's fine just get some 10min charge on it (besides, once the phone plugs in while flashing, its kinda charging in a way as well)
Hope I helped