Odoo Posbox image for raspberry Pi 4

kindly read all details I have got a Raspberry Pi 4 device and after loading the posbox image it is not booting I connected display screen to see what is there, it is not showing anything. I tried update but unfortunately all files on the SD card is readonly and can't change the status Required if you have posbox image ready for pi 4 it will be very helpful and time saving if you can do upgrade to the current image, it will be fine kindly bid if you know what is posbox and raspberry devices the work will require to connect my machine via teamviewer since posbox is connected locally I need the work to be done this week. we can discuss further and agree the good time for each if us