You can, if you have access to any digital camera with digital viewfinder. In short, a screen, where you see what you're about to shot. It may be even camera in another phone, or laptop webcam, or whatsnot. Despite ir filters on 99% of cameras, you should still be able to see "light violet" colored flashes of IR led. I think that a good idea to debug, would be to try checking N900's IR - if it *really* stop sending commands after first one ('till screen lock/unlock), or if it sends them, but for some reason, they're spoiled. /Estel