These boards have been removed from mostly new MONITORS with broken screens and should work if properly installed. HP V270 MONITOR POWER SUPPLY BOARD J04307040-2053-00309 / 320211009401000. Please verify that your board part number is the same as J04307040-2053-00309 / 320211009401000. 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)