Ibanez TSA15H tubescreamer not working

[Wes]

Hey there-

I can't find a schematic anywhere for this little amp and I wonder if they'd even give me one if I asked Ibanez.

Anyway- The issue is that when you flip the switch for the tubescreamer- dead silence.

-The boost works and using a footswitch gives the same results.

-The LEDs illuminate from both the front panel switches and the footswitch.

-I have thrown two new 4558s in just to try that, and that didn't help.

-Pulling either of the 4558s kills all signal

Any ideas as to why this may be happening?

Thank you for any help!

[Wes]

Pain.....in....the...........

A teeny-tiny jumper had a cold solder.........

So mad...