You could replace it for $30 or $40 from the right source. A lot less than even a simple CLA. Two things to check though. And here's why.
First, make sure you have fresh batteries. The camera has a battery check on it. There is a lever on the side of the camera body beneath the film rewind crank. Press this lever down and the red light should illuminate if the batteries are good.
Second, and I only suggest this as I was given an XG-1 as a 'junk camera' because the shutter wouldn't advance so I thought a capacitor had fried. But I was fiddling with it on Friday and I noticed that the edge of the shutter curtain was not perpendicular to the bottom of the shutter frame inside where you load the film. It was cocked a bit so I took the end of a ball point pen and lightly pressed the one shutter curtain over to the side and it slid over on the spring's tension. Then I pressed over the other curtain and it slid over on its spring tension as well and the mirror popped down. Not a junk camera anymore.