I buy lots of stuff from AliExpress or Temu. Some doesn't work and I get a prompt refund. Sometimes I can fix the device - i.e., cold solder joint. I recently bought a simple Bluetooth receiver [to play Spotify on an old stereo] using a common IC: PNSA15E7E. The red lights stay on, never gets to pairing mode. I tried resetting but no joy. Got my refund. Opened the case. Multilayer board, very, very few components. IC runs extremely hot to the touch. Ouch level. Resoldering didn't help. My WAG is maybe a bridged trace in a hidden layer or just a bad IC? Out of curiosity, any better guesses?
Bluetooth IC Overheats
Dec 08, 2024
Last reply: 1 year ago
3 Replies
Bad IC, probably on its second life having been recycled from somewhere else, and didn't enjoy being reborn....
Power supply backwards?
Runs off of a USB port so unlikely to be miswired. Thanks.
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