Fujitsu Siemens DPS-800GB-3 A - server power supply, how to start?

Hello
I have a Fujitsu DPS-800GB-3 A power supply and I have a problem with starting it. I tried the method from the topic: Link . The power supply turns on (the same symptom without these jumpers) and the green LED is blinking, but it does not give + 12V (with or without load). There are + 3.3V and + 5V voltages, but the most important one, i.e. + 12V, is missing. Is there anything else to connect, or is the power supply damaged?

best regards

I have the same problem, when connected, the power supply starts the fans, gives a voltage of + 5V, but no + 12V.

I tried to shorten pin 31 with 34 and 30 with + 12V as they advise in the topic with the same model of the power supply with the difference that the latter is a product of the company HP .

I managed to run the power supply, and we should shorten pins 31 from 34, and 26 to ground.
greetings