Some CPUs can't be supported by motherboard, please try to update the BIOS, please note that's not motherboard's defect. Some "Can't boot" problem's caused by memory, please clean the memory's gold fingers and clean the motherboard's memory solts. 1 x I/O back panel. USA, Austrilia, Canada, European Union. Please do not return any items without an authorization number or other instructions by us.Any packages that are send without our knowledge will be refused and no replacements will be issued. This item is in the category "Computers/Tablets & Networking\Computer Components & Parts\Motherboards". The seller is "boyd*tech999" and is located in this country: CN. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.