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Thank you for posting your question on Just Answer! I will be happy to help you with this problem.
When you say turns on with no picture or sound tell me how do you know its on?
Ok its a LCD and normally the popping sound on this unit is the power supply, but it would be easier if you were to open it and turn it on then you will know for sure which part is popping. Well repair for this power supply and labor is around 100.00 depends on were you live. Good luck friend