These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. ACER EI491CR MONITOR MAINBOARD JRYR38C-AN12WB / JRY-W9UHD-NV2. Please verify that your board part number is the same as JRYR38C-AN12WB / JRY-W9UHD-NV2. 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)