EM500 replace touchscreen
They are in fact very easy to replace if you:
1. Are very careful not to damage the other parts
2. Can find a replacement
Understand that the screen is actually two different components, first there is the digitizer which is the part that senses your touching the stylus part. It is a clear glass plate that sits in front of the color lcd unit (the other part). If only the glass is broken, then replacing the digitizer is a cinch.
If I remember correctly, the digitizer on the EM-500 is the same as the digitizer as on an E-125. You'll have to check to be sure though.
Anyway, it is not too hard, just needs steady, careful hands...and it helps to have a little experience taking these things apart...