The unit is working perfectly and there are no lights flashing in the front of the unit. Picture quality is also excellent. However, there is a loud humming or buzzing sound coming from the back of the unit. Sounds like the fan. When the TV is truned off, the sound winds down.
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It sounds as though your SMPS is seriously faulty and normally one can buy a kit to correct the problem if you are a TV engineer, however there could also be many other reason for the condition that you describe its almost impossible to guess correctly, it really needs a qualified engineer to assess the problem along with he or she having the set with them.
If it was transported likely the set was damaged--one of the three picture tubes used could have been damaged--the flashing light is the set trying to come on and the buzzing is related to whatever is bad.
This DLP tv have a colors wheel.The tv colors wheel,it dead.Have loud humming sound,motor noises and pictures flashes black&white within a picture.The colors wheel is dead and is spinning off of it axis and hitting of it sides motor walls.Tv must require a replacement of a colors wheel.Hire a tv tech. to do the job.The tv colors wheel is hard to replace.The tv colors wheel sit behind many manchanical parts,must take out even before u even can replacement the colors wheel itself.
Loud sound would be coming from defective color wheel that is mounted i light engine, next to lamp housing. Replacement of color wheel is required expertise/ experience and professional will do that for you in correct and in safe manner. Contact local tv repair shop to get color wheel replaced in tv. Thanks.