# Why Is My Scanner Screen Black, White, or Grey?

> Seeing a black, white, or grey screen when scanning in Ludex? Learn how to fix it by enabling camera permissions on iPhone or Android.

Source: https://help.ludex.com/en_us/why-is-my-scanner-screen-black-white-or-grey-H1zClV2jWe

Last updated: 2026-04-02T18:13:58.508Z

If you are trying to scan a card in Ludex and your screen appears black, white, or grey, this is most commonly caused by camera permissions being turned off for the Ludex app. Follow the steps below for your device to resolve this.

## Enable Camera Permissions on iPhone (iOS)

1.  Open your device **Settings**
2.  Scroll down and tap **Ludex**
3.  Tap **Camera**
4.  Toggle camera access to **On**
5.  Return to the Ludex app and tap **Scan** to confirm the issue is resolved

## Enable Camera Permissions on Android

1.  Open your device **Settings**
2.  Tap **Apps** or **Application Manager** (this may vary by device)
3.  Find and tap **Ludex**
4.  Tap **Permissions**
5.  Tap **Camera** and select **Allow**
6.  Return to the Ludex app and tap **Scan** to confirm the issue is resolved

## Still Not Working?

*   **Close the Ludex app completely** and reopen it after enabling permissions
*   If the issue persists, **restart your device** and try again
*   Make sure your Ludex app is **up to date** by checking the App Store or Google Play Store for any available updates

## Need Help?

If you have followed the steps above and are still unable to scan, please contact our support team at [support@ludex.com](mailto:support@ludex.com) and we will be happy to assist.