820-00840 20v no boot

[iremont]

Hey, board came in no power, i pluged tester, and it showing 20v, 0.017a and jumping 0.017-0.180 a, stays 0.017 and going 0.020 then 0.050, then 1 sec 0.180a, board no water damage, everything clear. Where to start

 

[2informaticos]

What voltages do you detect on the board?