If you are facing issue low picture quality issue on your Roku player, the main reason behind is poor network connectivity. Some tips to fix this issue and make an improvement in network strength.
1. If Roku is connected to Wi-Fi network, then you Roku must be placed within 25 meters from the router.
2. Increase broadband speed by disconnecting the other linked device.
For more assistance, contact Roku customer service phone number 1-800-296-1402 anytime in all over the USA.