HP Z400 error

hello. i am trying to complete a z400 build  i have used a power adapter for non HP power supply and a adapter for heat sink fan. the unit will power up but i have an error code #102 system failure and needs service. but i also get the blue HP screen sometimes . with both of these screens i try to go to bios with no effect. also a 3rd error stated a keyboard problem and i tried 3 keyboards still no luck. i have about 120 bucks into this  pc so far any help would be great. thank you. 

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  • 102 is a possible motherboard failure.

     

     
    1. Clear the CMOS.

    2. Remove the expansion boards.

    3. Replace the system board if steps one or two don't work.

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