I'm completing a EATPM project and I have on hand a BG soundboard 11581-557. I'm receiving no sound whatsoever other than a crackle/slight hum upon powering on. No change from the volume pot. Tested volts on power and it came back okay. Reseated roms.
On reflection, the 11581-557 is clearly underpopulated versus a stock Elvira 11581-2011. I'm wondering if it's a question of compatability.
Anyone have any experience of compatibility between System 11 soundboards? I do also have access to a RG 11581-576 which appears to be fully populated like the 2011, although I've not had a chance yet to go over schematics.
On reflection, the 11581-557 is clearly underpopulated versus a stock Elvira 11581-2011. I'm wondering if it's a question of compatability.
Anyone have any experience of compatibility between System 11 soundboards? I do also have access to a RG 11581-576 which appears to be fully populated like the 2011, although I've not had a chance yet to go over schematics.