SOURCE: tempremental playing dvds
In response to your jvc-a75r DVD player, sometimes the solution might be less complex than it may appear. Had the same problem with my Samsung s321,the machine refused to read DVD's but would play CD's no problem. Simply opened up the cover(usually)4-6 small screws, and found my dog's hair inside of the player covering the laser eye.Electrostatic ionization attracts dust,etc. into the player remarkably well sometimes. Carefully used a cotton swap to remove debri. PLayerworked fine afterwards ...Good luck!
SOURCE: DVD trays are stuck
Since it is unusable try this. It might help to have so\meone assist if the unit is heavy.
Raise unit and lower the tray end about 45 degrees down, while lightly shaking press the tray open, they might just fall out.
SOURCE: Tray issues
I have had this a few times and it is a pain. You have to completely remove the DVD unit from the chassis (ribbon cables and all). Once out, you turn it upside down and you will see a set of gears that drives the trays in/out. Manually rotate the gears to reset the tray position (one will likely be out of place when you open it up or a DVD will be skewed causing it to bind). This is not for the faint of hearted or non-mechanically enclined. This particular DVD changer unit is troublesome and finicky to deal with. I have also found that copied DVD's cause this to occur due to some issues with disc detection.
SOURCE: my JVC TH-G30 gives me a locked message when I try
hello
Setting the disc ejection lock
You can lock the disc tray to prevent the disc form
being ejected.
When the main unit is turned off, hold down the STOP
key at the front panel for 5 seconds
If you attempt to open the disc tray by pressing
OPEN/CLOSE key, the disc tray does not open and
“LOCKED” appears in the display window.
To cancel the disc ejection lock, hold down the STOP
key at the front panel for 5 seconds again when the
main unit is turned off.
“UNLOCKED” is displayed in the display window.
Note:
Before the main unit is turned off, DVD/CD function
should be selected.
SOURCE: blu-ray dvd disc error on jvc th-g41.
if your blu-ray is updateable then get update also try other disks
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