2 PSU's How to connect?

[beekeeper]

Usually switching power supplies don't work or work very bad if you connect their + pin(s) together (if they work, one will win the war, unless you connect their bypass/whatever feedback pins together). You should have only ground (black wires) connected, anything yellow/red/orange should never meet in same board ( you said partly ).

[monstrs]

Usually switching power supplies don't work or work very bad if you connect their + pin(s) together (if they work, one will win the war, unless you connect their bypass/whatever feedback pins together). You should have only ground (black wires) connected, anything yellow/red/orange should never meet in same board ( you said partly ).

Yes, from the beggining both psu's was connected with + , now when the minuses is connected, everything works fine.

[abracadabra]

Usually switching power supplies don't work or work very bad if you connect their + pin(s) together (if they work, one will win the war, unless you connect their bypass/whatever feedback pins together). You should have only ground (black wires) connected, anything yellow/red/orange should never meet in same board ( you said partly ).

Yes, from the beggining both psu's was connected with + , now when the minuses is connected, everything works fine.

This would have extremely helpful to have known earlier.

I'm pretty sure you have connected something incorrectly.

A picture would  be worth 10000000000 words.