These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. LENOVO P27H-20 MONITOR MAINBOARD 790R61300D01R01 / 494A002D1300H30. Please verify that your board part number is the same as 790R61300D01R01 / 494A002D1300H30. 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)