I would suggest you do notthing until you clarify exactly what caused the "no CA error".
- What type of reciever do you have ? DM800HD or a DM800SE ?
- Which Security SIM is installed ? SIM 1, SIM2.01, SIM 2.10 ,Ferarri , E-STAR ?
- Which image and SSL bootloader were you running on the box before the error ?
- What did you do immeaditley before the error started ? Software update ? attempted image upgrade etc ?
Dont try randomly flashing multiple different images and SSL bootloaders etc...until you establish what hardware, SIM and Bootloader your dealing with. They are not all compatible with each other..
I would hazard a guess at its either your USB to Serial Converter or the null modem cable your using, do you not have access to a laptop or pc with a com port.