We have PMP5000 board everything is plugged in like it was before when it was working, now we are getting no sound out to the speakers but we have signal through the board.

SOURCE: no sound to speakers

There are many things, including hardware failure to cause this.

Make sure that the PFL buttons are ALL up. The LED indicators on the right are shared with solo channel and main output.

REMEMBER that the MAIN 1/4 inch jacks are TRS balanced and plugging a mono cable into these OR st the other end plugging into a MONO will short out the balanced line drivers. Since this also goes to the power amp, that can ground out the signal to the amps. All the other 1/4 inch jacks are pseudo balanced and mono plugs will not cause a problem other than possible hum or noise levels.

Do you get anything out of the PHONES jack?

Note that the standby switch must be UP in the upper right corner... it kills the first 12 channels. ALso with two speakers make sure the MAIN slide switch is in the MAIN A MAIN B upper position.

Start with all your PAN controls at 12 o'clock.

I have repaired two of these units and a PMP3000. Great caution: NEVER pull or insert speaker cables while unit is on. Great damage can be done. IF the fuse blows do NOT replace it!!! Get serviced immediately as replacing the fuse will likely do more damage. The worst damaged one required replacing around a dozen transistors and other components.

The power amps in these have a habit of arcing out... NEVER store in a high humidity area!!!

Try a set of stereo headphones plugged into the L and R MAIN out 1/4 inch jack... If you have audio there your power amps have failed or the +/- 85 volt supply has smoked.

SOURCE: I have a Pmp5000 889406987784

Usual problem is the Channel A amplifier has burned and blown the switching transistors. Usually an internal board arc occurs and unless very skilled at board work of clearing the burned area and replacing the components you are better to replace the HCA2400 amplifier module... about $160

SOURCE: connecting compressor and equalizer to pmp5000

Use a two channel INSERT SNAKE. Plug the TRS connector for each channel into the INSERT jack for the mains in the area above the effects unit. Plug the TIP of each channel of the snake into the input of your effects unit and the RING plug into the output of your effects. The snake has ONE TRS connector and TWO TS connectors per channel.