HP 255 G4 Series AMD E1-2500 1.40GHz EM2500IBJ23HM Processor Laptop Motherboard 814610-001. Model Number: ABL51 LA-C781PHP Part Number: 814610-001Compatible Part Numbers: 814610-501 814610-601 818073-001 818073-501 818073-601CPU: AMD E1-2500 1.40GHz EM2500IBJ23HM ProcessorCompatible Models: HP 255 G4 SeriesPlease Note: Motherboards are part number specific. You must order by the exact part number of the motherboard you are replacing; this is required in order to avoid returns, delays and restocking fees. You can NOT go by the model or serial number alone! We obtain cross reference and compatibility information from the manufacturer (as well as other various sources); while we do this to the best of our ability, we do not guarantee its accuracy. If you are unsure, please check with your laptop manufacturer. Please order, based on the part number only!