I represent ASA Electronics, the producer of the JENSEN brand of televisions, stereos, and speakers and the Voyager brand of observation monitors and cameras. At ASA, we strive to provide excellent customer service and product satisfaction and would like to offer some assistance in this matter.
I would recommend trying the reset button which is located behind the detachable faceplate. See if this corrects the issue.
If the trouble persists, you or your dealer should call us for further troubleshooting. You can reach us on our toll free technical support line at (877) 845-8750. We are available M-F 8:00 AM until 6:00 PM EDT.
Please let me know if you need any further assistance.