Boss CE-1 chorus/vibrato LED not working

[pontiacpete]

I tried the LED swap. The questionable LED worked fine when swapped, just the same result but in reverse.
The cathodes are connected.

[Helmholtz]

Please measure again the D102 anode (connected to point 22) and cathode (connected to point 21) voltages.

[pontiacpete]

At 22 it’s-12 and -14 at 21

[Helmholtz]

At 22 it’s-12 and -14 at 21

So you have +2V measured from D102 anode to cathode?
Typically a forward voltage of 2V is enough for a red LED to produce light.
Some red LEDs might need a little more, like 2.2V.

[pontiacpete]

I could swear that I measured -12v at 22 before but now I’m getting nothing, only -:3v. Still -14v on the other end.

[Helmholtz]

Please directly measure the voltage between the ends of D102 (anode to cathode) observing the polarity (red lead to anode - black lead to cathode).

[pontiacpete]

Sorry I meant to write, measuring from point 22 to 21 it’s .005vdc.

[Helmholtz]

Sorry I meant to write, measuring from point 22 to 21 it’s .005vdc.

All I can say is that your measurements are inconsistent, so impossible to interpret.
When there's no substantial voltage across the diode, both points 22 and 21 must sit at minus 14V.

Check for bad/intermittent contacts and if the meter battery is good.