I have had the similar issue in my instance my PC kept defaulting to the wrong drive. The Drive to my OS was missing in the Bios. Its often caused by power surges/outages or incorrect power downs. The DVD tray being open should not matter. It should almost certainly be in the bois but may not be obvious. What make is your Motherboard ? Its not necessarily a big deal to fix I'd put taking it to a shop on hold till you try a few things
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Last edited by Cyborg322; 11-20-18 at 03:07 PM.
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