we bought many ultra zone ZMX2600 through TEM from Italy now we have a problem with your product not working when it was started it's glow for 2mn after that the power gone please advise what we can do


We bought from your compagny this divise ULTRA ZONE ZMX2600  unfortunately last day it was stopped no output program was radiated  when i reach the transmitter site i found the said product off  i tested it it sglow for 2mn after that is shutdown please advise what we can do i trace the fault ifound that the -15v is not fixed and going to zero  we remove the connections inside the problem remain the problem ia the frontal board