# Prime 4 not working as controller
**URL:** https://community.enginedj.com/t/prime-4-not-working-as-controller/23084
**Category:** Standalone Controllers
**Tags:** engine-os, serato, prime4, controller
**Created:** [June 8, 2020, 1:35am UTC](https://community.enginedj.com/t/prime-4-not-working-as-controller/23084 "2020-06-08T01:35:22Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Alsky97](https://community.enginedj.com/u/Alsky97)
#### Post date: [June 8, 2020, 1:35am UTC](https://community.enginedj.com/t/prime-4-not-working-as-controller/23084/1 "2020-06-08T01:35:22Z")
Hi, I recently moved my DJ setup from a Mac to a PC, and my Prime 4 seems to not like that. Whenever I plug in my Prime 4 to my PC and run it in “computer mode” with Serato open, it starts up perfectly, allowing me to control Serato as it should. However a problem arises whenever I try to select something with the controller.
Whenever I select something, my computer makes the windows “device disconnected” and reconnected sound about 4 times before the Prime screen will go black, reading only “Computer Mode.” During this time, everything I do in Serato (play a track, change a track, etc.) will still send to the Prime 4, sending audio out of the device and changing colors/ lights on the board itself, but I will be unable to actually use the board for any input.
I am up-to-date on the Windows driver and Prime 4 update (1.4.1) as well as Serato. I am plugging into a USB-3 port that I know has no issues.
---
### Author:  [@NoiseRiser](https://community.enginedj.com/u/NoiseRiser)
#### Post date: [June 8, 2020, 5:36am UTC](https://community.enginedj.com/t/prime-4-not-working-as-controller/23084/2 "2020-06-08T05:36:25Z")
Check if Your computers usb is not going in to power saving mode and disconnecting the device.
---
### Author:  [@Christopia](https://community.enginedj.com/u/Christopia)
#### Post date: [June 8, 2020, 6:45am UTC](https://community.enginedj.com/t/prime-4-not-working-as-controller/23084/3 "2020-06-08T06:45:07Z")
Have you anything else plugged into the USB ports
---
### Author:  [@Alsky97](https://community.enginedj.com/u/Alsky97)
#### Post date: [June 9, 2020, 1:31am UTC](https://community.enginedj.com/t/prime-4-not-working-as-controller/23084/4 "2020-06-09T01:31:59Z")
Yes, I have plugged in a VR headset, so I know the USB port works and is able to handle data transfers
---
### Author:  [@Antchi](https://community.enginedj.com/u/Antchi)
#### Post date: [June 9, 2020, 6:54am UTC](https://community.enginedj.com/t/prime-4-not-working-as-controller/23084/5 "2020-06-09T06:54:20Z")
There might be too much power being pulled out of the usb bus so try plugging in the controller only
---
### Author:  [@Alsky97](https://community.enginedj.com/u/Alsky97)
#### Post date: [June 9, 2020, 10:57pm UTC](https://community.enginedj.com/t/prime-4-not-working-as-controller/23084/6 "2020-06-09T22:57:13Z")
The Prime 4 is the only thing being plugged in. I was just saying that in the past, I have plugged in the headset, so I know the port is able to power devices enough