Requesting how to enter service menu on RCA smart tv SLD65A55RQ

Requesting how to enter service menu on RCA smart tv SLD65A55RQ Requesting how to enter service menu on RCA smart tv SLD65A55RQ. Have tried the menu 1147 and a few others. I did buy a universal remote from Amazon and it works but cant get into the service menu to change the bit on it after installing a new main board. ANSWERS:
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