Hi Is there any who know how to enter service menu for proxima x350 , ASK M3 or Yokogawa D-1200X ?

I have been trying to do the same thing with my satellite box that has HDMI output. It sounds like you do not have the A/V attachment for the back of the projector that would allow you to at least use S-Video or RCA (composite) connections. I've been looking at the cables that come with the projector and there is a VGA to DVI cable for use with most computers. When I look at the DVI connection it is diffent that the typical DVI cable you buy at an AV store. I notice there are less pins where the large group is and there are two posts above and below the "dash" (the plastic post inside the cable connection) on the cable that comes with the projector that is specific for use with computers. You can't put the DVI to HDMI connector on that cable because there are no holes for those 4 posts. A normal DVI cable will plug into the projector but my guess is that cable does not carry all the signal necessary to light the projector up. I'm no AV pro but what you describe is what my projector does too so its not your machine- it has to be the connection. I want to recall that Proxmia used to sell two types of these A/V attachemnts- one had DVI connection and the other had component video input what would still provide HD (1080i) capability- but I can't find it on the website now. My guess is that we need to find out whether there is a special cable that needs to be constructed or not. I have a contact I'm going to try. If I find anything else out, I'll let you know. Hope you will do the same if you get an answer. Good luck.