Problem assembling servos

[Eduardix2020]

Hello,

Does anyone experienced during assembling, the servos rotating continuesly?

When I start plugging the servos they do fine and return to position 0 but after I continue with the other half, for some reason they start to rotate all together continuesly.

After this I have to turn off the control board and become a mess.

I read that maybe the board is badly designed to filter the draw current, did anyone successfuly achieved the assembling with the control board ON as indicated in the manual?

I am using a 6v battery pack

Thanks!

Any suggestion?