I played with beta4 on my SL-7500C yesterday and switched back to beta1 after a little while. Now I noticed that there are some "ghost shadow" on my screen: it's like some faint image on top of the real image (just like what you will see on a TV screen if you use an indoor ant.)
I don't know if this is a hardware problem. (I dissembled my 7500 several times and some connectors might worn out) But I just wonder if it's possible that this has something to do with installing beta4 (I didn't see the "ghost shadow" before). I mean, could an incorrect refresh rate kill the LCD control IC?
Does anybody have some idea?