Hello.
I have similar problem. I was offered a used DM800hd pvr. I think it is a clone model. It was without use for some time and had an old firmware I think. In its menus I put to upgrade, but when it reboot it showd NO CA FOUND error.
I read a lot and opened it to see the sim card. It is white and I believe it is a SIM 1 updated to Ferrari.
If I run japhar flasher the box shows IP and "serial mode". Then I can flash firmware. But I falshed several Ferrari firmwares but the box shows always NO CA FOUND when I turn it on.
Am I doing anything wrong? What shoul I do and flash?
Thank you very much.
