PCB replacement circuit board kit for the ALEKO GG450 GG650 GG850 GG900 GG1300 GG1700 swing gate openers This replacement circuit board is easy to install and setup PCB replacement circuit board kit for the ALEKO GG450 GG650 GG850 GG900 GG1300 GG1700 swing gate openers. Easy to install and set up, your gate will be working again in no time.Also,this circuit board works for the old board model PCBLM433