Laptop back from service

Today I got my laptop back with a new motherboard + graphics board. Apparently these two are fixed together. Along with the replacement I’ve noticed that 2 bugs were no longer present:

• the system doesn’t freeze anymore when I eject the disk (it has been doing this since I bought it)
• I can update to the latest nvidia driver without having my fan trying to lift the laptop. Before, whenever I updated the driver I would hear the fan running at full throttle for about 2 seconds, shutting down and then starting all over again. Extremely annoying!