Phaser: "Device not found for BEAM0" hardware failure?

Question

Our Phaser has been working well since April. Suddenly today every attempt to use it nets the the following python error: 
 Traceback (most recent call last): File "/home/xxxx/Phaser/pyadi-iio/examples/phaser/phaser_minimal_example.py", line 68, in <module> my_phaser = CN0566(uri="ip:phaser.local") File "/home/xxxx/.local/lib/python3.10/site-packages/adi/cn0566.py", line 73, in __init__ adar1000_array.__init__( File "/home/xxxx/.local/lib/python3.10/site-packages/adi/adar1000.py", line 1318, in __init__ self._devices[chip_id] = adar1000( File "/home/xxxx/.local/lib/python3.10/site-packages/adi/adar1000.py", line 425, in __init__ raise Exception(f"Device not found for {chip_id}") Exception: Device not found for BEAM0 
 This error occurs in all the example programs in pyadi-iio/examples/phaser as well as Jon Kraft's PhaserLab examples. These all have been working very well since April and now non are working. 
 What can I try or do?

Robert32 · Accepted Answer

The problem was a bad power supply! 
 Not at all what I had considered. Jon suggested this unlikely possibility in an email. Even though this is pretty much the equivalent technical support solution of, "Did you check the plug?", I dutifully swapped out the 5v power supply with another known good one I have been using. Much to my surprise, that fixed it! 
 The odd thing is this supply had been functioning well for months. Not sure why it failed, but I am very glad it was such a simple fix. Thanks again Jon, and also, I believe, to Mark Thoren.)

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Phaser: "Device not found for BEAM0" hardware failure?

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