Philips 30PW850H service menu Clear Errors, what's it do?

Hello,
Recently I was looking around at the options in the service menu for my Philips 30PW850H HDTV. I didn't touch anything important (just put the sharpness for Multimedia picture mode to 0) and I wanted to know what the clear errors option does. Does it put the settings to the factory defaults?

P.S- Is it good to have my sharpness settings at 0? Or should I put them up to about 15? I know it isn't good to keep it at a high number.

Thanks!

Sharpening is useful for analog signals, but digital signals don't need sharpening - they come that way. In your case you're adjusting your VGA input, so a LITTLE bit of sharpness might be good...