My Mac book pro has the end of a earphone stuck to it. After this I updated to maverick, and this massively slowed down my computer.Now my laptop is switching on and logging in just fine, but after logging in the screen goes white. What can the reason be?

At first my laptop was fine after the earphone end got stuck in. Soon it started getting slower, and suddenly it stopped switching on. The people in the service station said that it wAs because the hard disk drive was corrupted. I came back home, and immediately it stopped working again. This time they said it was because of water spill. They changed the entire key board and then it started working for a while. Later I updated to maverick and that slowed down my computer. Once, I switched on my laptop, logged in, and then the screen went white. When we took it to the service center they said they will need to replace the hard disk. I am not sure what I should do. Any suggestions?

Liquid damage from water spill is progressive, unfortunately.
Best.

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