# Raspberry Pi 4 8 GB not booting with GPIO connected

**URL:** <https://forum.core-electronics.com.au/t/raspberry-pi-4-8-gb-not-booting-with-gpio-connected/10961>\
**Category:** Raspberry Pi\
**Created:** [7 August 2021 23:28 UTC](https://forum.core-electronics.com.au/t/raspberry-pi-4-8-gb-not-booting-with-gpio-connected/10961 "2021-08-07T23:28:49Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![John126534](https://avatars.discourse-cdn.com/v4/letter/j/ccd318/32.png) [@John126534](https://forum.core-electronics.com.au/u/John126534)\
**Post date:** [7 August 2021 23:28 UTC](https://forum.core-electronics.com.au/t/raspberry-pi-4-8-gb-not-booting-with-gpio-connected/10961/1 "2021-08-07T23:28:49Z")

</div>

Hi, my RPi is working perfectly and has been for some time. Recently I started building a weather station and connected a bunch of sensors to the pi. All the sensors were tested with a python program individually and they work. I shut the system down.

The next day, I booted up the pi and it hung with a blank screen and no disk activity for ages. I powered off, disconnected the power leads (5V and 3.3V) and then booted the pi. Everything worked fine. I reconnected the two power leads and the sensors are working again.

Why should the pi refuse to boot with the power leads connected?

Thanks fr your help.

John

---

<div class="post-metadata">

**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:** [9 August 2021 12:09 UTC](https://forum.core-electronics.com.au/t/raspberry-pi-4-8-gb-not-booting-with-gpio-connected/10961/2 "2021-08-09T12:09:12Z")

</div>

Hey John,

Welcome to the forum!!

Usually a short across the power pins would cause the Pi to turn off. Leaving it on a metal surface will also cause shorts and cause the Pi to not boot.