Question about LG LHY-518 System

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LG LHY-518 my dvd play always say disc unknown every time i try to play a real dvd what can i do some 1 plz help i just bought a dvd i almost took it back until something told me to try 1 of my dvds to see if it work and it did the same thang as my new dvd did

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  • gilles26 Jan 29, 2008

    i have the same problem and i thought if i unlock it maybe it will work but i cant find the code....any help?

  • frankkeupuch Jul 14, 2008

    every time when play always say disc unknown every time i try to play a real dvd

  • Anonymous Nov 24, 2008

    control de audio

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I had the same problem. Also, the disc tray had issues opening if there was no disc in there. The problem was two fold... I think.

1) It was kinda dusty inside the machine and needed a good air can dusting. Get around the tray but be careful not to turn the can upside down and freeze components. I also ran a lens cleaner disc several times.

2) The tray top (only visible with the system open) was starting to warp... likely because the build up of dust was creating too much heat, also causes issues in reading discs... I created a make shift cushion that I taped to the top of the plastic tray that was depressed when the top of the machine was placed back on. This required several tests as if too much pressure was applied, the tray wouldn't open at all and I got read issues in the middle of playing a disc (possibly an alignment issue of the lens caused from the pressure). I finally got a good system where I occasionally have push the top with my finger to open the tray only if it was empty so my padding (made from gauze and gauze tape) was barely getting pressure. Again, this took about 30 minutes of trial and error to get it right. The heat and the displacement due to the warped cover could have caused read issues.

I don't know if either or both of these were the cause of the problem but I can safely say that I have no issues now and yes, prior to this, I slowly went from 100% reading discs to almost 0%.

Sorry for the winded response but this saved me from buying a new system and may save you. Good Luck!

Posted on Feb 04, 2009

  • pappadj Feb 04, 2009

    Oh and make sure to open it up to dust... I even removed the fan. There's a reason the machine is slightly noisy. It's very easy to open. Three screws on the back on the silver plate. Pop that off and then remove the side silver plates. Then there are 3 screws on each side. Get a semi-decent screwdriver as you may do this several times and may end up stripping your screws if your driver doesn't fit or is poor quality.



    May the Force Be With you!

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Posted on Jan 02, 2017

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I need remote codes for a lg dvd recoder combo model number LHY-518


hello after a long search through the net the only solution to retreive the code is through LG themselves you will need to send them an email with your dvd model they will email you the code
another solution would be to purchase a all in one remote this i think would be best as the codes come in the manul goodluck

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I have a LG LHY 518 system and the subwoofer doesnt work. Can I replace it with any LG subwoofer?, or do I need a certain kind of LG subwoofer.


I'd lurk on eBay or other auction sites and see if one becomes available.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/LG-LHY-518-Home-Theater-Systems-manual/id/366ag212/t/2/

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Take a clue from that non-standard system cable between the electronics and the sub. It powers the sub's amplifiers and carries signals. Wanna take a chance on the pin-assignments being consistent across all product lines?

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The manual for a LG LHY-518 Home Theater System can be found here:
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1 Answer

I have an LHY-518 that will not read any discs. Always displays the error message "unknown disc, please, check disc again", then ejects the disc.


Hi,

Your no disc error can be a DIY like the following steps.
Assuming that the disc is good.
1.Clean the lens. - Sometimes because of dust the lens can't read any disc. Try clean the lens by soft cotton buds. Be careful while doing this.
2.Replace the ribbon - Check the ribbon connected to the lens from the main board for scratch, damage. Once it has an open line then of course the lens can't read the disc. Also try to erase the contact by pencil eraser. If you've done the steps above and the symptoms still there then the next step requires you a little knowledge in soldering technique and reading the ohmmeter.
3.Check the motor - Check the motor that spin the disc with an ohmmeter. You can test it using the ohmmeter (x1) even it is connected on the lens assembly. Good motor - reading should be fairly high and it will spin. Bad motor- reading will drop to low resistance and will not spin.
Hint : 50% of my repaired unit the above parts are commonly caused of the problem.
If you confirmed that you have a defective motor then replace it with a new one. Before replacing the new motor you have to check the clearance of the disc holder with the old one. The clearance should be the same as the old because if not the lens will not read the disc if it is too far or too close.
Ifyou already cleaned the lens, and confirmed that the ribbon is good as well as the motor then I've advice you to send it to repair shop because the next step should be done with an expert because it is quite technical diagnosing the fault between the pick-up lens and the main board.

Hope it may help you.
Have a nice day!

JDVillanueva

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My 2 1/2 year old LG dvd/vcr recorder will play some dvds but will not play others. It says unknown disc. I was told to try a lens cleaner; I bought one and the lens cleaner says unknown disc as well. ...


Hi,

Your DVD /VCR says unknown disc because the
dvd which you have inserted is not of the supported format by player.

If you insert unsupported formats only it will say as unknown disc.This is not related with disc cleaners.

Please insert the supported formats and it will play the disc.

Thanx

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It has no region code .You can download anydvd at slysoft.com

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Unknown disc error


You need to clean the reading head. When doing this you need to be very careful about static electricity. And never run the unit with anything more than the lid off.
First there are 3 screws on each side that take a side cover off.
Second there are 2 more screws that hold the lid on. Once the screws are removed lift the back of the lid first and tilt forward to clear the front switches.
Third; Remove the top of the DVD unit, to do this there are two screws and two tabs that hold the top on the DVD unit.
Fourth; To clean I used a vacum, but you can use canned air. But be very careful. These are very delicate parts.
Do not let the vacum touch any of the electronic parts. Do not do this with the unit plugged in. Before you test the Player put the top of the DVD unit back on. You can leave the main lid off at this point.

Good luck,

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