Not quite. Skylab did have one of it’s solar panels that did not deploy, because it was ripped off during launch. The thing that caused overheating was one of the outer panels which was also ripped off during launch and exposed the under skin of the space station. They ended up having to put a tent over the exposed part to prevent overheating.
Thanks for refreshing my memory. If my memory is correct, the cost was kept down by repurposing a rocket stage, which gave them all the room they had to move around in.