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M lg bp145 quit playing blue rays but it will play dvds. Why?

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  • Annielee
    Annielee Aug 15, 2016

    Want to play blu-ray? It can be achieved by use of Leawo Blu-ray Player:http://www.leawo.org/blu-ray-player/.

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  • 369 Answers

Blue ray DVD's are read by a Blue violet LASER. I know that sounds pretty obvious but the colour blue is closer to the upper end of the spectrum and therefore has a shorter frequency and therefore you can generate and read much narrower data tracks. DVD's and CD use an older technology and use Red laser light which has a much wider and therefore less compact track size. So with a lower track density you get less information on a DVD.

The blue laser can be used to read both formats (and CD) but when reading the Blue ray disc the accuracy required is far greater to hit the track. Tracking errors caused by worn gears steppers and spindles can cause the Blue ray to miss the track but still have enough tolerance to read the much wider DVD/CD track.

The laser head isn't one laser, it actually produces two separate wavelengths, one for Blu ray discs and one for Red ray (DVD/CDs)

You can have a condition where the "blue-violet Laser diode fails but the red laser diode is still working. In this condition, it will exhibit exactly the effect you are experiencing.

Posted on Apr 14, 2015

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Posted on Jan 02, 2017

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SOURCE: blue ray player wont play blue ray ''Kung Fu Panda'' disc.

i fixed this exactly as previous posted solutions, however a couple of points.
a) recordable CDs work if you don't have a DVD burner.
b) I didn't have a CD burner that would do an "image burn", I downloaded a free copy of "Express Burn" and that worked fine. The disk needs to be "finalised" or "fixated", it should do this automatically, or it may be a tick box selection.
c) I got a "No DWLD 09" when I put the disk into the player. I found this was an incompatibility with the CD-R (Maxwell) I was using. I changed to JVC and it worked fine.

Posted on Dec 29, 2008

  • 259 Answers

SOURCE: LG BD 300 blue ray player won't play dvds

have you tried more than one dvd ?? i have heard that even the slightest mark on a disc and they won't play hope this helps regards Jim

Posted on Apr 09, 2009

  • 60 Answers

SOURCE: My lg blue ray dvd player wont play regular dvd's

sounds like a bad optic or a software issue

Posted on Jun 09, 2009

  • 2 Answers

SOURCE: Samsung Blu Ray 1500 model wont play any new discs

If you tried firmware update and it doesn't work and its less than a year from the date of purchased call Samsung customer service and claim for warranty . Panasonic has the same issue without explanation.
regards
Dario

Posted on Jul 25, 2009

  • 36 Answers

SOURCE: blue ray DVD disc doesn't load but other DVDs do load/play.

You may have to apply an update. There's a key used to decrypt the content on Blueray discs that changes from time to time in an attempt to thwart piracy. Updating involves visiting the manufacturer's(Samsung) website, downloading the update onto a USB stick, and starting the player with the USB stick inserted.

Posted on Aug 02, 2009

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