These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. ACER VG271 MONITOR MAINBOARD 02-MART2522-AA03 / 2RT522A0MND. Please verify that your board part number is the same as 02-MART2522-AA03 / 2RT522A0MND. 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)