The menu for your television should have an option to "scan" for digital channels. It could take a while for the TV to do that, but once it's done, you should get all the channels you used-to get. Check the instruction book for your television. But I don't understand what you think you are DOING to "switch" from analog to digital. There is no switching between mode for your television. The SWITCH occurred at the television stations, when they switched from analog broadcasts to digital broadcasts. If you live VERY far away from where the television station towers are (e.g., you depended on re-broadcast/repeaters) it is POSSIBLE that you are not getting a strong enough signal for the television to work properly, but - again - the scan routine for your television will show that it cannot "find" the channels.