680 Pro only 4 motors spinning

Hope this works posting from my cell.My 680 Pro is almost ready for maiden flight but one problem only 4 motors spinning. APM 2.6 3.2.1 flash, flashed with HEXA flash. Works fine if I hook each to ch 3 and spin them. Any thoughts?

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  • Post a log of spool up.

    Did you make any changes to RCmap, or some odd radio configuration?

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