cd player not reading a disc? Laser dirty?

Sometimes there is a capacitor in the power supply that directly feeds the laser diode ... when that capacitor begins to fail it will intermittently not hold/store the charge and keeps the laser from powering up ... eventually it will fail completely and the laser will not power up at all

Just another possibility to check out

Hey, thanks Mental. Never thought of looking for that on u-toob. My 3910 gets erratic disk read errors and eventually stops reading altogether. I had to bring it in for service, but I bet I can follow a DIY video. I'll give it a try.

You can buy a laser lens cleaning cd disc at best buy for about 10 bucks. Just a series of soft little brushes on the disc. They work pretty good. I'd try that before anything else.

FWIW. The problem is worse when the unit is well warmed up, say after playing a dvd.