LA3a problem

[John Noll]

I have an LA3a that just went down.
The meter hangs at around -5db when the unit powers up
instead of zero.
The unit was recapped a couple of years ago, so I'd
assume that the caps are OK. The plug-in opto unit is
original and pretty old. What are the symptoms of a bad
opto? Thanks.
--
--
John Noll