This board requires calibration after installation, please message prior to purchase if you don't understand how to do this - It will not work if you don't calibrate it, and if you initiate a return stating the board does not work because of that, it will be tested on return and you will not receive a full refund (see below).
All boards I sell are fully tested, and fully functional - you will not have an issue with the board, but I strongly suggest you confirm that you have a board issue and that all of your other parts/systems are in good working order, as damaged parts can cause shorts that break boards and pop the built in fuses. Any returns made as defective will be fully tested, and if it is determined that the board is not damaged, or that the buyer has damaged the board, the maximum allowable amount will be deducted from the refund or the refund will be rejected altogether. Please message me prior to initiating a defective return to avoid any misunderstandings. Returns are accepted for this listing so there is no reason to state an item is defective when it is not.
Returns are accepted, buyer pays return shipping. All boards that are returned to me will be fully tested prior to issuing a refund. Damaged boards will not receive a refund. Boards that do not have a serial number are marked with a serialized tamper proof sticker. Stickers must be untampered in order to receive a refund.