Last year I bought a premanufactured computer that I've slowly been upgrading. I almost got everything replaced and upgraded besides a motherboard, disk drive, CPU heatsink, ram, and a case. Recently I purchased a new case for my computer. Over the weekend I have been working on transferring all my parts into it. Unfortunately when I put my motherboard into the case I ran into a problem. The power cable, I'm not sure what it's called exactly but it's the wire that goes from the power button to the motherboard. Anyways it doesn't fit into my motherboard so I can't turn my computer on. The only thing I can think of is that I need a new motherboard, or a new case but I don't want to do that. So my question is, what motherboard do I need to buy? I know what CPU socket I need (FM2) but I'm not sure about what else.
My specs
CPU:A10-5800K
GPU:AMD Radeon 7870
PSU:Thermaltake TR2 500W
New CASE:Thermaltake Versa H22
Motherboard:MSI MS-7778(Jasmine)
HDD: WD Black series 1TB
Disk Drive:SuperMulti DVD Burner Drive
My specs
CPU:A10-5800K
GPU:AMD Radeon 7870
PSU:Thermaltake TR2 500W
New CASE:Thermaltake Versa H22
Motherboard:MSI MS-7778(Jasmine)
HDD: WD Black series 1TB
Disk Drive:SuperMulti DVD Burner Drive