Works fine on my mobile but no internet on range extender when using my laptop

Hello @dmiccichewr1 

If certain device could not get internet from range extender: 

• Confirm other devices could get internet from Wi-Fi of range extender 
• If connect the device directly to router's Wi-Fi network, could it get internet from router? 
• Please check if the PC/ laptop get IP & gateway address, and try to change DNS to 8.8.8.8 on that certain device as Step5 here

https://www.tp-link.com/support/faq/41/

• Contact device manufacture and update driver for the computer

Also confirm range extender is on the latest firmware (select hardware version first, then check corresponding firmware)

https://www.tp-link.com/support/download/re650/

Can I know the Led status on Range extender, the hardware & firmware of your RE