If your credit cards are not processing through EDC try this simple EDC Quick fix Guide.
From a run command type CMD and hit enter
Type net stop edcsvr
Wait until you message that service stopped
Now type net start edcsvr
Wait until you message the service started
Now open EDC and see if your cards are processing.
If that does not fix your issue. Dial 844-256-4243 for Aloha EDC Offline transaction support and Restaurant POS System Help. we will answer our phone, usually in the first 3 rings..