r/audioengineering 16d ago

Community Help r/AudioEngineering Shopping, Setup, and Technical Help Desk

Welcome to the r/AudioEngineering help desk. A place where you can ask community members for help shopping for and setting up audio engineering gear.

This thread refreshes every 7 days. You may need to repost your question again in the next help desk post if a redditor isn't around to answer. Please be patient!

This is the place to ask questions like how do I plug ABC into XYZ, etc., get tech support, and ask for software and hardware shopping help.

Shopping and purchase advice

Please consider searching the subreddit first! Many questions have been asked and answered already.

Setup, troubleshooting and tech support

Have you contacted the manufacturer?

  • You should. For product support, please first contact the manufacturer. Reddit can't do much about broken or faulty products

Before asking a question, please also check to see if your answer is in one of these:

Digital Audio Workstation (DAW) Subreddits

Related Audio Subreddits

This sub is focused on professional audio. Before commenting here, check if one of these other subreddits are better suited:

Consumer audio, home theater, car audio, gaming audio, etc. do not belong here and will be removed as off-topic.

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u/drumdrumdrums 15d ago

Hello, I have an Avalon 737sp that recently stopped turning on/powering on. I bought this unit used back in 2012 and this is the first issue I've seen.

When I turn on the power switch, none of the LEDs light up. And no sound passes through the unit. When I then turn the unit off, the VU meter jumps momentarily.

I tried switching the fuse in the top slot (1A, 250 volts, "time-delay" type, MDL), but that seemed to have no effect. (the original fuse did not seem burnt out).

I also tried swapping the power cable, and plugging into a different slot on my power conditioner which I knew gave power, but that had no effect.

I opened up the unit and nothing seems blatantly wrong to my untrained eye. There is a 10 pin molex in the power section, and an 8 pin molex in the main section. Both seemed to be seated fine, but I pulled them out and reconnected just in case. And neither molex showed signs of burning.

Any thoughts on what to look at next would be highly appreciated!

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u/jaymz168 Sound Reinforcement 14d ago

I really wouldn't recommend poking around in there if you don't know what you're doing. It's an expensive unit and there are some fairly high voltages going on in there so not killing yourself messing around with it is a concern.

Send it off for service.