Doorbell123,

I'm sorry to hear that you're having this issue.

The only type of troubleshooting I might suggest is re-seating the lamp. With the unit powered off and unplugged, try removing and then reseating the lamp. In some cases, this can fix the issue. If not, or if you're unsure on how to do this, it may need to be serviced by a technician.

--HDTech