---
title: How to set the Symphony I/O Mk I to auto power on
description: How to set the Symphony I/O Mk I to auto power on
---

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# How to set the Symphony I/O Mk I to auto power on

To configure Symphony I/O Mk I to power on as soon as AC power is present on the rear panel AC input follow these steps: 

1\. Disconnect Symphony I/O’s AC input.  
2\. Remove the top cover as described in Installing I/O modules.  
3\. Place a jumper across pins J18 (whose location is indicated below).  
4\. Replace the top cover before applying AC power.  
5\. The front panel power switch remains operational. 

Auto Power is useful in circumstances where an external power switch is used to power on multiple devices, such as a rack of Symphony I/Os with a master power switch.   
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