Depends on what they are connected to. What are they?
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Also, there may be a short delay in the order the D/A search for a signal at turn-on. The Toslink jack your using may be the first one in the search sequence. The other inputs may be checked for a signal after the jack your using is found to not have the signal first. So the other jacks may give you more time to power your source up, since they (other input jacks) are checked for their signal after the one your using.