ADB: device unauthorized on a gadget without a screen, what to do?

Question

Android

Hello. I have a device, specific, without a screen and input methods: only the volume and power keys. So I made a hard reset on it and now I get a sabzhe error on all computers when I try to connect.

error: device unauthorized. Please check the confirmation dialog on your device.

However, I cannot see the dialog and, moreover, click it, for obvious reasons.
I tried to connect from the recovery - it used to help when I knocked down the usb debug settings, then it helped and ADB clung, but now it doesn't, it also says that the device is unauthorized.
What can you try to do? I read that in this case the only available command is adb sideload, but I don’t have the original roms and I’m not at all sure that it will help.

Answer 1

If there is USB, then you can try using a USB <-> HDMI adapter.

Answer 2

I have practically the same problem. Here is my question on Stack Exchange: android.stackexchange.com/questions/165083/samsung... . I hope we both get some advice there.