I would like an exact model number since Philips Pixel Plus brought back a myriad of models on google, but initial search seems to indicate that you have a widescreen direct view CRT HDTV, either 30" or 34" diagonal?
It does some wierd internal signal processing too, interpolating all signals up to 2048 horizontal, then downscaling them to the screen. Don't ask, the
press release was dodgy about how that was exactly done.
The problem probably stems from that you have a 50/100Hz PAL model trying to display 60Hz NTSC games, and the bar cut off is probably the difference between 480 lines vertical res of NTSC vs 576 of PAL, but also could be some funky internal processing quicks of the Philips.