Problem: just put new cables on for spring cleaning & can't get the chain to stay on outer ring when shifting

Setup: Shimano 105 front derailleur, shifters, double up front, 8 speed in back

Have done thus far: adjusted, set, checked rear derailleur using Sheldon & a few other sources. RD is set.

Also done: put chain onto inner chainring, biggest cog, adjust FD cage to not rub. Also set height/angle of FD at the clamp, using marks in paint and checking spacing from ring to cage at 1-2mm.

Then: pulled cable taut, secured with anchor bolt

Now: tried to shift into the outer ring and it moves there, but as soon as release shifter, falls back onto inner ring.

Tried a variety of things: pulling cable more/less, adjust barrel, playing with H/L screws.

Nothing works.

Solution?