# High pitch screeching coming from a board

**URL:** <https://forum.core-electronics.com.au/t/high-pitch-screeching-coming-from-a-board/11533>\
**Category:** Adafruit\
**Created:** [25 September 2021 09:54 UTC](https://forum.core-electronics.com.au/t/high-pitch-screeching-coming-from-a-board/11533 "2021-09-25T09:54:09Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Liam120347](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/liam120347/32/5003_2.png) [@Liam120347](https://forum.core-electronics.com.au/u/Liam120347)\
**Post date:** [27 September 2021 08:44 UTC](https://forum.core-electronics.com.au/t/high-pitch-screeching-coming-from-a-board/11533/3 "2021-09-27T08:44:17Z")

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Hey Trent,

Its just the power supply through the I2C bus on the Pico. I tried probing around with my fingers but to no avail.

 ![image](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/9/9abb146ca0372a79d5f5e436e43b2413246dd2eb.jpeg)

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