broken optoisolator?

[M. Nail]

is there a way to test an optoisolator ic (ECG 3087 specifically) to see
if it's broken/blown/nonfunctional? I've built a midi thru but it doesn't
want to work...

--- mnail at u.washington.edu //---

"A racing car adorned with great pipes like serpents with explosive breath
and seeming to run on grapeshot... is more beautiful than the Winged
Victory of Samothrace" -Filippo Marinetti