I have a beringer pmp 5000. Out of the box, I

These are no longer made but I see them on the used market in the USA in the $200-250 range.

Can you elaborate a bit more about what you mean by "turning off?" What are you doing up until that point? Does it do it at certain times, etc.?

You can get the entire service manual for this unit here:
BEHRINGER PMP6000 SCH Service Manual free download schematics eeprom...

for a 220v 50hz 1000w the fuse is T 6 3 AH 250v
for a 100v 1000w the fuse is T10 AH 250v just make sertun thats wright or contact the manufacture address 18912 north Greek Parkway, suite 200 bothell, WA 98011 USA phone +14256720816

What is up is one of the two power amps is blown... I know this problem... It is USUALLY the rearmost channel which goes to the left Speakon faacing the back. Weak insulation between layers of the multilayer circuit board arcs and fries three transistors and a diode and sometimes a few more components. It takes a lot of skill to restore the module and is beyond most repair shops. A whole new module costs about $155 from Full Compass. The amp is an HCA2400 module, but you MAY need the Behringer part number to order it from Full Compass. Also please read my tip on Fixya for PMP mixers regarding the hazard when using 1/4 inch plugs from the Speakon connectors... the Channel A sleeve is the "hot", not the tip and if you ground the sleeve, goodbye channel A...

I don not know French.. I will get my wife to translate. I have schematic and can interpret transistor numbers. Schematic:

http://elektrotanya.com/behringer_europower-p0569_hca2400_sps1000_dpx_pmp-1280s_5000_sch.pdf/download.html

Scroll down to "get manual" and click to download. IGNORE other download links.

If this is a Behringer PMP take it in for repair... It is NOT a DIY project.

hello,
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Good luck..

Assuming you are using BOTH power channels for your main speakers, you MUST use external, additional, amplifiers for the monitors. There are ONLY two power amps in the PMP5000.

The other option is to run mono for the mains and use the second power amp (comes out on the Speakon connectors) to drive the monitors. For this, the little slide switch has to be on the middle position.

Doing this, you have to adjust the monitor volume controls for each strip.

With the AB switch at the center position Mon1/Main you control the volumes INDIVIDUALLY with the MON pot for each input that is a couple positions above each of the input sliders.