Ok, got the service manual for chassis 24M824M8 25M8 27M8 32M8 Service Manual
Coligion, double check the sticker on the back to see if it says 24M8 anywhere on it. This service manual does mention model 24RF50S, so I'm almost certain it's the correct one. The manual does state the sequence to enter the SAM (service alignment mode) is 062596 followed by OSD/Status button. Pages 20-22 detail how to enter the sam. So, either something is wrong with your set or you're not entering it properly. If you can get in, pages 51-54 of the service manual give a brief overview of the software alignments available. Don't touch any of the options bytes or other menus of the sam, i'd just stick with geometry and if you've got a color meter, the white tone menu. Also, here's the link to all Philips consumer information on your set http://www.p4c.philips.com/files/2/24rf50s/
Edit: I just noticed your model number was 24RF50S141. The 41 at the end makes me think it's not a US set. If it's not, I still wouldn't think Philips would have different SAM codes.