My Mackie1604VLZ is always cutting out every so often while playing live, audio just quit but power still on ???on every chanels no audio comin out just little bit of tiny distorted sounds ,thats all you hear and next day it will play again for a little while then quit again, what could be the promblem with this mackie mixer ??? please help need advice...

You can do a major amount of troubleshooting using tests from the many jacks on this unit.
I can walk you through a lot of those if you keep getting back to me with the results. First test: When the failure occurs does one or both sides of the headphones plugged in the headphone jack ALSO quit? Also does the level meter LED's reflect loss of signal? If these are still OK I want you to plug the headphones into the MAIN MIX MONO OUT jack. The headphone signal won't be very strong, but is it OK and not distorted.

I hope you have remembered to use BALANCED (TRS) audio interconnect cables and not plain mono cables from your mixer to the amps. Use of mono cables shorts out one side of the balanced output driving amps in the mixer. Also the other send of these MUST connect to balanced amplifier inputs... NOTE some amps don't have this and you have to use a BALUN or a DI at that end.

Lastly, ALL inteconnected equipment MUST be powered from the same source or receptacle for system safety.

Feel free to contact me via email or whatever.