Hi Paije Tocsede,
Thank you for reaching Microsoft Community. I understand that you're having issues with your Slim Pen 2 when using Microsoft Whiteboard on your Surface Pro 9.
First, let me ask you some questions to better understand your situation:
- Have you checked the battery level of your Slim Pen 2? If the light on your pen is blinking red, you may need to change or charge the battery. You can check the battery level in your settings by selecting Start > Settings > Bluetooth & devices, then finding your pen.
- Have you updated your Surface drivers and firmware using the Surface app? You can open the Surface app and expand Help & support to check if the update status is "You're up to date" or something else. If needed, select the option to update the devices.
- Have you updated Windows to the latest version? When you update, you'll get the latest fixes and security improvements, helping your device run efficiently and stay protected. To check for updates, select Start > Settings > Windows Update, then select Check for updates. Make sure all updates are installed including Optional updates.
Additionally, kindly try also running the Surface Diagnostic Toolkit on the device to run some system checks and repairs then see if issue persists. See: Fix common Surface problems using the Surface app and Surface Diagnostic Toolkit - Microsoft Support
If still issue persists, let us proceed troubleshooting the app itself and see it would help. Follow these steps below:
- Repair or Reset Whiteboard:
Open Settings > Apps > Apps & features. Look for Whiteboard then select the More icon. Select Advanced options then select Repair. If issue persist, try the Reset option. See: Repair apps and programs in Windows - Microsoft Support
- Update Whiteboard:
Update the app through the Microsoft Store app by following the steps here: Get updates for apps and games in Microsoft Store - Microsoft Support
If issue persists after all the steps suggested, may I know which Surface Pro 9 configuration do you have? Intel or 5G?
Let me know how it goes.
Kind regards,
Marrion