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Hi! My name is ***** ***** I can assist you with this. I may need some additional information from you first in order to give a complete answer.
Do you have small digital multimeter so we can do some testing? About $20 or so at most hardware stores and easy to use. I can supply a manual and guide you in some tests to get to the root of the problem. I am understanding that the display won't come on the optical?
Were the part numbers of the new optical and board the same as the ones you took off?
Just following up to see if perhaps you missed my earlier responses to your question? Easy to do considering the volume of e-mail that most of us get every day! If you need me to resend it please let know. Thanks!