Well i ordered the SF-HD 65
Because my 3930 bought new half the price in 2009 and not used much (maybe 30 hours a year) was refusing to read originals dvd/cd's in the last few months.
Go on the web to find what the problem was, CHINA. Not surprisingly!
Since the 2910-2930-3910-3930 age that JAPAN had labour done in CHINA. (For what i read the transistors on the laser assembly will go dead after a hundred hours maybe more) and need to be changed!
The Laser part is the weakest link on those players, and being a small DIY guy i put my hand on it!
-YOu need to remove the antistaic protection for the laser to work.. Simply remove the solder ball with an hot solder iron and make sure the tracks do not have solder!
After the hardware change you need to reset the software/hardware!
-Turn off not standy
-Turn on while pressing PLAY + SKIP FOWARD
-Display show INITIALIZE , turn off then after
-Set the customs preferences again, don't use HDMI now because reseting will make HDMI off.
Have joy! AGAIN!
(The 3930 inside got ELNA SILMIC capacitors... now i know what brand/model to change my capacitors on my audio card, it will make a drastic but not night and day diference for better audio from the PC)