HP E3615A 0-20V 0-3A DC Power Supply - Faceplate Loose 136926746224 but channels 9 and 13

but channels 9 and 13 show signal input but there is no audio output

Manufacturer Mountz Model Number K350-A SKU 19-73791 Ref 23-105750

Manufacturer JDSU Model Number SB2E40084+27CF003FA SKU 19-53121 Ref 23-109060

Manufacturer Stanford Research Model Number SR850 SKU 19-77459 Ref 23-111429

HP E3615A 0-20V 0-3A DC Power Supply - Faceplate Loose 136926746224 but channels 9 and 13Condition Used Description This item is fully tested and in excellent working order. Item will come with a 30 Day Warranty. Cosmetically in good condition showing minor scuffs scratches blemishes from previous use. The face plate is loose but still attached. Includes DC Power Supply as pictured. No additional items or accessories are included. Unless pictured, no power adapter power cable included. Photos are of the actual unit for sale. Inventory is