My sago palm branches are turning brown.
Certified GKH Gardening Expert
IF this plant is outdoors, then it's likely experiencing some cold damage. You will need to remove the brown fronds this spring, but only those, as they will not come back. Do not remove green parts of fronds. These articles will help you as well: https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm
This article will help with wintering your sago in the future: https://www.gardeningknowhow.com/ornamental/trees/sago-palm/sago-winter-care.htm