I was using my MacBook today and it crashed and the dock turned silv, I restarted the mac and it was still the same, then I loaded disk utility and checked the disk and it is saying disk is fin. It flashes grey inconsistently and the dock has turned

I was using my MacBook today and it crashed and the dock turned silver, I restarted the mac and it was still the same, then I loaded disk utility and checked the disk and it is saying disk is fin....
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