These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. LG 23MP57HQ-P MONITOR AC ADAPTER ADS-40SFG-19, 19V 1.3A. Please verify that your board part number is the same as ADS-40SFG-19, 19V 1.3A. 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)