These boards have been removed from mostly new TVS with broken screens and should work if properly installed. SHARP LC-50Q7030U TV POWER SUPPLY BOARD 222172 / RSAG7.820.7748. Please verify that your board part number is the same as 222172 / RSAG7.820.7748. 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)