@reverendo wrote:
Hi everyone,
I recently bought a set with an RPI4, PSU, Ninja Coupe’ cover and a fan-shim.After assembling and powering up the device, I had to check 3 times to make sure the fan-shim was working (I’m using it without the script) as it was really silent. Amazing.
Now, after two weeks, it started buzzing too loud so I was wondering what could be the cause.
I disassembled it 2 times: checked everything, used some canned air to eventually clean the dust, and carefully put it in place again, but to no avail.I have actually discovered that the RPI4 has an issue with the external powered USB HUB I was previously using. The HUB power-backs the RPI with the +5V pin, preventing it to start properly.
I was wondering if this issue could be related to the noisy fan-shim (somehow “super-powered”) or could be something different. In this case, could someone suggest what to check ?
Thank you in advance.
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