With the version 3.10 and 3.11 firmware, the "SYNC" button on the remote should bring up the sync adjustment on the front panel, at which point the navigation buttons allow adjustment and the SELECT button allows you to accept a setting. In this case, though, it sounds like you are running into more - you are not getting the on-screen menu either. That's a bit of a stumper.
There's a basic checklist of questions that occur to me. Do you have the TV set to use the 990's composite, s-video, or component monitor output? Next, did you press "TNR" on the remote before pressing the "MENU" button located directly above the "CH+" button (not the button labeled "TONE" with a secondary label of "MENU")? It sounds like you've at least covered the second question by using the front panel MENU button anyway, but I figured I'd toss them both out. If neither of those turn anything up, it may be best to let Outlaw support weigh in (either by calling them at 866-688-5292 or by opening a ticket on the
support site ).