These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. ACER G276HL MONITOR MAINBOARD 5E3MH01048 / 4H.2L101.A4C. Please verify that your board part number is the same as 5E3MH01048 / 4H.2L101.A4C. 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)