Compatible Part Number/s IV14167 AS023220500 AS023175001 TBD512NR-1 AS023217502 AS0231721C1 AS023175111 Package Includes 1PC 1x Original or Fully Compatible Inverter Board for Laptop Dual CCFL Backlight LCD Screen Inverter Board Important!: The common knowledge: both bad inverter board and CCFL Backlight will cause the same problem DARK screen, And CCFL backlight have age ,bad CCFL will damage the FUSE and TRANSFORMER on the inverter board. Highly recommend replace both the Aged CCFL and defective inverter in the same time.