Pressed the MENU button appears the message: OSD LOCK OUT .
Anyway the picture is fine.Pressed the AUTO button, message: ADJUSTING... while the pitture is moving a little bit to the left and right then the moving stops.
If the video cable is not attached the message: CHECK VIDEO CABLE

The problem is solved. I've filled the right content into the U401 EEPROM and now the OSD is OK and the monitor works well.
Thanks for your attention.

I've mistaken. It is not HP1052 but HP1502. Sorry.