Help I did a factory restart to my F21 and it has been stuck on a strange icon screen for two days, what should I do?

[AGoldenDragon]

So I have an F21 that I had to reset to factory settings, but for some reason it's been stuck on this screen for two days, I think its operating system was deleted or something, but I can't try to fix it because it's impossible to access the files (even via PC).

The model of the phone is F21, but it is actually a kind of MP4 player device that runs on Android.

 

[mikedt]

I guess you might need to re-flash the manufacturer firmware.

 

[AGoldenDragon]

I guess you might need to re-flash the manufacturer firmware.

how can i do that? I can't through the computer because it doesn't recognize the device.

 

[ocnbrze]

how can i do that? I can't through the computer because it doesn't recognize the device.

who is the manufacturer of the phone. is it oppo?