SSL 4000 Channel Issue

[imloggedin]

I am having an issue with a racked SSL 4000 channel I bought awhile back made by RAD (4K-CS). It worked perfectly and then one day I turned it on and all the LED's come on and it will not pass signal. Can any of you SSL experts point me in a starting direction before I pop it open?

 

[Brian Roth]

Check power supply rails.

Bri

 

[user 41968]

Check the Pico fuses as well.

 

[imloggedin]

Thanks for pointing me in the right direction. The voltage regulator on the negative rail is shot. Will replace it and report back.