These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. ACER EK271EB1 MONITOR AC ADAPTER (12V 3.5A) SOY-1200350US-056. Please verify that your board part number is the same as SOY-1200350US-056. 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)