today I performed installtointernal, no errors were shown, but the box do not boot (the screen is black).
the ssh is not accessible.
only Ethernet plug leds are blinking.
Before restoring android settings and abandoning the installation, try booting CoreELEC with microSD or USB flash and repeat the installation and perform installtointernal more times. On some of my devices I had to do installtointernal three times and let linux CoreELEC fix the errors. After more than a year everything is still working fine.
If your TV Box is bricked, I only see two alternatives:
1.- Prepare a flash memory with CoreELEC and try to start your TV Box, if this does not work then …
2.- Obtain an IMG firmware for devices with dtb gxl_p231_1g_dvb (A1 Pro, Mecool KI Plus (S905D), Strong SRT 2402, …) and load it with a PC and a USB male to USB male cable. If the firmware does not match the device you have then your remote control will stop working, so use a generic USB remote control.