So due to poor planning I activated a smack pack and about a week went by without it being used, a day or two at the beginning spent at room temperature before I put it back in the fridge. Then after that week or so I made a starter at around 1.040, 2 quarts, and dumped in the smackpack. I left for two days (with the starter on the stirplate) and coming back, there's no ring to indicate any krausen. Should I just assume this thing is stone dead and use a new smack pack?
Or is 48 hours not enough time? Is there any other way to test viability or bring it to life?
It's not a big deal, as my horrible handling of this yeast pretty much made me assume it'd screw up, but I figured I'd try and salvage it all the same.