Thank you, i know the procedure you mention, and typically the console would come up and giving me a matter of moments to insert the DESS key, otherwise it would then go back to sleep and id have to repeat.
1. Make sure your new battery is good.
2. Make sure you did not reverse polarity.
3. Check all fuses.
4. Test all relays and replace the 30 amp main in the fuse box it could be sticking open.
Relays I have read are somewhat tricky to test and when they test good on the bench they sometimes still are finicky. The 30amp main relay is common and fairly inexpensive to just replace.