EVH5150III pilot light issue

[fossilshark]

Hi all! this 5150III has a very strange issue with the pilot LED. It is very dim and flickers.

The strange part is: I already rebuilt the +15v and -15v supply to get the amp working, I measure absolutely no AC on the +15v and -15v lines (I even checked with an oscilloscope, perfectly flat) and the flickering is not corresponding with any output levels or me wiggling the LED connections. I cleaned and re-installed the pilot LED with no change.

Any ideas on what could cause this?

[AlNewman]

It's a red LED?  My 1st thought would be a ground connection, a possible faulty LED, or a bad connection in the LED circuit. 
But different color LED's require different currents.  The schematic shows red.

[fossilshark]

Yes it is a red LED. I also thought ground connection but it is tied to the same trace as the 15v supply GND so I would expect other issues if that was the case. I am really scratching my head on this issue.

[tubeswell]

I already rebuilt the +15v and -15v supply to get the amp working,

Including new voltage regulators?

[mresistor]

try another LED