# PIronman board shorts when three GPIO ports are set to high
**URL:** https://forum.sunfounder.com/t/pironman-board-shorts-when-three-gpio-ports-are-set-to-high/467
**Category:** General
**Created:** [August 16, 2023, 7:14pm UTC](https://forum.sunfounder.com/t/pironman-board-shorts-when-three-gpio-ports-are-set-to-high/467 "2023-08-16T19:14:12Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@xurchin](https://forum.sunfounder.com/u/xurchin)
#### Post date: [August 16, 2023, 7:14pm UTC](https://forum.sunfounder.com/t/pironman-board-shorts-when-three-gpio-ports-are-set-to-high/467/1 "2023-08-16T19:14:12Z")
I’m trying to use the GPIO ports on the PIronman board to drive some mosfets. The first two work great, but the moment I turn the third one on the board shorts and the entire system immediately turns off. I’ve tried a variety of GPIO ports in case one the third one is bad, but all of them cause the shutdown. Hoping it was just using too much voltage to support I plugged a second power supply directly into the raspberry and tested. This time the raspberry stayed running, but the PIronman board shut down. I also disconnected all wires from the GPIO lines to make sure there wasn’t a hardware short.
My next test is to force the LEDs being driven by the board off to see if I can conserve some power.
Anyone else try using the GPIO ports? All you need to do is set three of them HIGH.
Update: I shut off the LED and the problem persists.
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### Author:  [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)
#### Post date: [August 18, 2023, 2:02am UTC](https://forum.sunfounder.com/t/pironman-board-shorts-when-three-gpio-ports-are-set-to-high/467/2 "2023-08-18T02:02:56Z")
I am sorry I didn’t quite understand your question.
What code did you execute?
Please refer to our tutorial link carefully:
[https://docs.sunfounder.com/projects/pironman-v2/en/latest/features.html](https://docs.sunfounder.com/projects/pironman-v2/en/latest/features.html)
GPIO26 cannot be moved because it is a shutdown signal. Once you run the code, set GPIO26 to a high level. If the motherboard detects the high level, it will power off and shut down.
Note: The GPIO pins of the RGB lights can be changed, please refer to the tutorial:
[https://docs.sunfounder.com/projects/pironman-v2/en/latest/ws2812\_strip.html](https://docs.sunfounder.com/projects/pironman-v2/en/latest/ws2812_strip.html)
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### Author:  [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)
#### Post date: [August 18, 2023, 2:07am UTC](https://forum.sunfounder.com/t/pironman-board-shorts-when-three-gpio-ports-are-set-to-high/467/3 "2023-08-18T02:07:25Z")
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### Author:  [@xurchin](https://forum.sunfounder.com/u/xurchin)
#### Post date: [August 18, 2023, 2:42am UTC](https://forum.sunfounder.com/t/pironman-board-shorts-when-three-gpio-ports-are-set-to-high/467/4 "2023-08-18T02:42:50Z")
Thank you so much! I didn’t see that set of docs that explains the pinout. I changed my code to use pins 17, 22, and 27 and it’s works fine! I appreciate you taking the time to answer!
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### Author:  [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)
#### Post date: [August 18, 2023, 3:24am UTC](https://forum.sunfounder.com/t/pironman-board-shorts-when-three-gpio-ports-are-set-to-high/467/5 "2023-08-18T03:24:30Z")
We are glad to know the issue is resolved. 😃