Folder with sign question (no issues in hardware) - help
The folder with a flashing ? is an indication that there is no operating system installed on your MacBook.  Depending on whether your MacBook is an early or late 2011, it may not be equipped to do internet recovery  by starting it with CMD-OPT-R.   If CMD-OPT-R does not begin internet recovery, then you need either a USB installer, a Snow Leopard DVD disk, or to take it to an Apple Store for them to install an operating system on your MacBook, which they'll usually do for free.