These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. ACER R240HY MONITOR MAINBOARD R3524-1982-0150 / 0171-2271-5703. Please verify that your board part number is the same as R3524-1982-0150 / 0171-2271-5703. 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)