Smart set radio cks 1851. It will not keep the time and now blacks out. New battery installed. Folled plan of reset. lasted approx 10 minutes and blacked back out. Was plugged into electric at the time. Approx. 5 months old. Birthday present 3/21. Joyce

Sorry it took so long to get back to you with a solution to your problem. You must try to reset the microprocessor in the Clock/Radio. To do this you must unplug the Clock/Radio from the A/C power source.Then remove the Internal battery(CR2430). Let the Clock/Radio set without a power source for about 3 hours. This will discharge the microprocessor and reset it. After you have discharged the microprocessor,you can reinstall the internal battery. Connect the Clock/Radio to the A/C power source. The Clock/Radio's Functions should have returned to normal function. If the Clock/Radio did not return to normal function, you must replace the internal battery and again let the microprocessor discharge. After the microprocessor has discharged,put in the new internal battery and reconnect the Clock/Radio to the A/C power source. The Clock/Radio should have returned to normal function. If you are still having problem with the functions of the Clock/Radio, You will have to call Emerson Customer Support. The telephone number for the Emerson customer support is 1-800-909-1240. you can call them between the hours of 8am-4:30pm CT. Give them the make and model number of the Clock/Radio and ask them for assistance. I hope this information help you with your problems with the Clock/Radio. Thank you for using FixYa and have a nice day!