PXE-e6Media Test Failed, Check Cable, No Operating System Found

Getting this error when I try and slave a drive. Jumper settings are correct, cable is in good shape. Will boot to master drive, but when I slave the other drive I get this message. Any suggestions.. I'm trying to slave a drive in order to recover files.
 
Master is in the middle, slave on the end. Have slaved multiple drives this way with no problem. Tried master on end, and slave in middle and pc boots to a blank screen with blinking cursor.
 
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