Thank you for the suggestion Ron.
I have already used some of this AV combinations successfully with an old Beovision Avant 28 but the Beovision 6-22 does not respond.
I have tried "AV"+"A.TAPE", "AV"+"V.TAPE", "AV-PC", "A-V.TP2" and "A-V.AUX" with the Beovision 6-22 turned off but nothing worked. The Beovision does nothing, just remains turned off.
For this to work, is it necessary to configure the TV with a particular "option"?. The Beovision 6-22 is configured as V.OPTION 1.
Let me clarify that I'm conecting the video output from the PC to the DVI input of the TV, and the audio output from the PC to the two RCA audio inputs of the TV which are associated to the DVI input. With the TV off I select in the Beo4 the option "PC" from the list and the TV handles perfectly the video and oudio output from the PC.
The missing part is how to turn on the TV just to handle the audio input signal 🙁