LG LST-3510A DVD Player/Receiver "laser detector" Questions

...It is on a level surface too. What could be causing it? A bad laser diode or quadrant detector in the "Head" you could try a "Clean" with a cleaning product, but my bet is a bad laser .. so

...detector, essentially the "Laser Head Assembly", this has faulted. (Or the associated drive circuitry). Replacement is your only option. If you wish to have it repaired, please ask for a 'Quote" ...

laser light inside or the light detector does not work well. Try blowing into it just to move the dust around a bit - maybe it will start working. If you have a can of compressed air (e.g. airDuster),

...detector. If the bottom plastic is damaged or scratched, thus interfering with the laser transmission, it can be simply re-polished. 2) If the problem happens to many or all DVD's, than the player is ...

laser or the light detector is dirty. Take the cover off and spray it clean with some canned air (Staples, walmart, target, ...). Keep the can up-right while spraying or you will get very cold liquids

Every disc I put in reads 'bad disc" In that case I would suspect that the laser head Diodes, or perhaps the Quadrant Detector is faulty in your unit.

...laser head and or quadrant detector simply go faulty, or perhaps get dirty scratched etc. You could try a head cleaner, but i do not think that will make any difference, but is worth a try. ...