It depends. If components on your card's PCB, such as resistors, capacitors, and power controllers, are damaged, they can be swapped out – if you have the right tools and technical know-how. Repaired or refurbished cards have a reduced lifespan in most cases. And in the case of more profound issues with the GPU (the actual die), you can't get it repaired. It's best to replace the graphics card in such cases.