New Firmware for AVTECH CPCAM KPD674A 4CH with mouse 1044 - • CCTV Forum

i have 2 units of avtech DVR, one is KPD764ZA and the other KPD764ZB. i tried to upgrade the firmware, but only works for ZA, ZB is refusing the firmware upgrade. the motherboard ZA is marked as rev A, and ZB is rev B. i think there is several motherboard

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