These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. ACER HA220Q MONITOR MAINBOARD R3522-4002-0150 / 0171-2271-6213. Please verify that your board part number is the same as R3522-4002-0150 / 0171-2271-6213. The part number is the first number left of the /, or the sole number listed. Most often written in title as (part number / board number)