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Your video allowed me to bring my Sony CDP-S37 from 1992 back to life! It's people like you that make the internet great! Thanks a lot!

I just repaired my seventeen year old Denon UD-M31 by following your instructions, it’d read some CD’s intermittently, I turned the all important screw anticlockwise as it wouldn’t go clockwise, turned it about just under half a turn or a gnats tit, anyway it’s even reading slightly scratched CD’s like my original Shaved Fish by John Lennon. I cannot thank you enough especially for making Covid-19 lockdown more bearable 👍

Dude!!! Just 10 minutes ago I made my Denon work again. I’m so happy for this, and all thanks to you and your video. I just used the Q tip and this did the job. Dude you deserve a 6 pack of Heineken. Thank you so much.

I gave this a try and it worked for me. The ohm ranges were too low for me to get a good reading with my Fluke as a baseline, so I just tweaked them both up about the same amount as in your video and my DVD player came back to life. Thank you for sharing this.

@Electronicle : Thank you so much for those videos. I just fixed my Harman/Kardon BDS. @Tinkmarshino : I ordered a set of Pentalobe and electronics screwdrivers instead of "trying" with the stuff I have at home. It worked #1. Now I have a set of tools to fix my electronics, and I can listen to my CDs again… Cost: 25$. Benefits: I learned. Awesome!

I cleaned the lens on my dvd player after watching this. It works now. Thank you!

Thank you so much sir. yesterday I visit the service center and it took 150$ to fix my cd player. but I fixed by your way. I deeply appreciate your help.

Thank you. Watching this video gave me the confidence to remove my CD player's chasis and knowledge to clean the lens, which was basically all I needed to do to get my player working.

Thank you, my friend. Your helpful information restored my JVC Compact Component FS-M# System. How can I say thanks for all the things you have done! So glad to learn this. God bless!

This inspired me to open my old JVC console CD player that would seem to pick and choose which CDs it would play, and after cleaning the laser and slightly tweaking a screw I thought might be the one you were referring to, it now works. Not sure which thing actually did the trick, but thanks either way.

Good video showing a possible problem scenario. Trimmer pots become a bit oxidised and high resistance over time. Therefore the setting is no-longer in spec. Moving them slightly might clean their contacts a little which in this case helped but you really have no idea if the calibration is correct or not. As pointed out, it may go over spec and burn out the laser. If the high resistance is elsewhere, like the tabs that hold the contact wiper in place. Doing this will not fix that. My suggestion is to get some contact clearer lube such as Deoxit spray. Do not spray this directly on the trimmer But spray a little into a small container. Then dab the smallest amount possible onto the trimmer contact points and dab these areas with the corner of a tissue to soak up excess conditioner. Wait for it the dry before powering up and testing again. This should soak through the oxides and regain continuity through the trimmer without moving it at all. If this is the least invasive approach and you can always try moving it if it doesn't work. The brand I suggest is expensive but is pretty safe on most components (some aren't). It is a product that can be used to clean and lube scratchy potentiometers such as volume controls as well as faders and faulty switches.

Thank you! I was able to get a portable dvd player going again for a young boy who has no tv or computer to watch anything because he and his family are refugees; the look on his face when Toy Story started playing-priceless!

This method perfectly works with my old 1998 Sony Discman D-171. No disc error fixed! Thanks a lot

Just fixed my LG 4K home cinema player.not worked for 2 years,thanks a million,saved me time and money👍👍👍👍👍👍👍

Thank you so much! 🙏🏻🙏🏻 You are the man! Worked, and I will always be grateful for the knowledge, the added life, and the anxiety relief, especially in these trying times. God bless you

At 2:50 in “trimmer pots for the laser diode.” Nice! After watching 3 other videos this fixed my Sony CDP-211 - thanks!!

Worked on my Yamaha CD player, did clockwise first didn’t work, back to original position and half a turn anti clockwise and worked, thanks mate 👍

One thousand thanks, my friend ! It's something I can't do by myself, but I can show a technician HOW this can be done. I live in Rio de Janeiro, Brazil, and good technical assistance for sophisticated devices is something too hard to find here, mostly lately. Best regards, once again many thanks !

Before going to this extent, I’d recommend simply removing, cleaning and resetting to connection cable. 9 times out of 10 that’s the real issue and adjusting the settings may not be necessary. It’s very possible that was the issue here as well and the adjustments weren’t necessary.

Your video helped me fix two units. It worked perfectly.

My DVD player shows the same problem.Thanks for sharing the information.

Definitely helped! Did just what you said and it works perfect! Thank you!

Many thanks! My 30y old Sony CD is back to life again! Amazing.

This worked for me and I learned so much - thank you 🙏

Great-Thanks for Sharing... I cleaned the Eye on Mine awhile back, that did the Trick. But this Added bit of Knowledge, will Certainly Help!

Thank you so much!!! Cleaned laser with IPA and a cotton bud (Q Tip) on my Pioneer DVD player (model DV-686A-S) as per your video here - perfect, works again! Thanks so much! Didn't see any pots to adjust, but luckily the clean did the trick! Have to say, the laser didn't look dirty prior to cleaning - proof is in the pudding I guess!

I just fixed a nad cd player I found in a Goodwill for 7 dollars by watching your video and adjusting the voltage screw. Thank you very much.

one more thing that will make fixing things easier.. actually it is a saying that's been around for awhile.. it is : "the right tool for the right job" It will make your job so much easier.. so before you start your project make sure you have the right tools.. Good job on this fix.. I learned something new..

In older disc players that have ceased to play or even load a disc, the fault my not be a weak laser, but rather oxidized connections and contacts: as someone else here suggested, remove the ribbon cable and use a little contact cleaner on it, then re-insert it and pull it out a few times to clean off any oxidation. VERY gingerly, as these thin flat cables are uber delicate. Same goes for the diode current pots: mark the original position of the wiper, spray a little contact cleaner (a very little bit goes a long way) on the carbon trace, and turn the wiper back and forth thru its full range a number of times, setting it back to the mark. If this does not fully restore function, then try turning up the laser current a little, maybe 5 minutes (clockwise) as viewed on a clock face, that is, 1/12 of a circle. These procedures have worked for me on several players as old as 35 years. The unit Mr. Electronicle worked on in the video has the diode current pots in a relatively convenient location for adjustment. Most of the players I have worked on have the pots on the underside of the laser board, which is a REAL pain in the arse , necessitating removal of the laser unit.

Awesome, this worked on my old JVC ghettoblaster! Luckily it was easy access to the adjusting knob, without any disassembly.

Thank you man.I have Yamada dvd player and it has the same problem I thought the.motor is the problem.

I commend you both for your persistence and for your assistance. Thank you.

Just to thank you, cause i've just fixed my Kenwood that wasn't working for about 10 years. I did try a lot, adjusting to the left and to the right on 3 three different screws next to each other... and when I was about to quit, it started to work. First the sound was still a bit weird but with another small adjustment I made it work perfectly. Can't thank you enough!

Thanks man, fixed my cd player thanks to this video!

It's not always the laser diode going soft ... it's often the track on the tiny potentiometer that gets dirty and grimy so making the contact with the wiper unreliable .. I personally would mark the position with a very fine point... and then spray they track with electronic cleaning solvent and move the wiper quickly from one end of the circular track to the other.... this beds the wiper in and reduces contact resistance...

Man a q tip and a little vinegar worked perfectly thanks!

Thanks dude; worked like a charm adjusting those pots. Rock On!

Just took it apart and it worked. Thanks!

Thank you very much, this solution worked perfectly on my Kenwood 5 CD player. (model 103 CD). I had to remove the back panel in order to access the little screw used to fine tune the diode.

Thanks friend! I lucked out; the Qtip on the laser was all it took to get my old laptop to read disks again.

Good on you mate! Another thing is if the DVD wont open you will have to change the little rubber band on the front that is slipping.

Thanks Sir, nice video full information and clear step by step........Didi, Jakarta Indonesia

Sometimes simply removing and putting back the ribbon cable fixes the issue. Oxidation may take place over a period of time. Also, the surface of the pots could get some oxide over time, and thus simply cracking their position can fix issues. Most likely the player will work for a number of years to come simply with what this guy did to fix it. Going back some years ago (late 1980's through to the mid 1990's) I used to service CD players at a contract job for warranty service when these players were expensive. I was servicing units from consumer level to professional level types. I was doing the tracking adjustments using test CD disks, a scope, and referencing to the service manual. I was servicing Sony, Panasonic, and some other types. I was also servicing VCRs and TV set. We were changing motors, belts, the laser unit assy., circuit boards, and etc. I used a laser meter to verify the laser strength. The factory level service manual normally has the emission specs for the laser for testing it. Especially with the early generation players the lasers were failing. The newer replacements were usually improved and would last a lot longer. Servicing these units out of warranty was fairly expensive. With consumer type units it did not pay to service them. Better to buy a new one. When servicing any CD player, never look directly in to the laser if you remove the shield! The beam is invisible to the eyes, and looking in to the laser can and most likely will lead to permanent eye damage. With many models of players the laser is turned on with the power applied, and it stays on. If the CD/DVD player is a writer, while in the play mode the laser works at a low power mode. In the burning (write) mode it is at a fair amount of power. I cannot remember off hand the power levels, but even in the play mode the laser is dangerous for eye sight. The reflected beam can also be dangerous! If you have a laser tester you can see if the laser is alive during standby mode if you have the shield removed, and put the sensor over the laser lens.

I cleaned mine and it worked! Thank you

This is helpful. Thank u!!

Thank God for u I did this just now and my dvd player that didn't work for months is now working perfectly thank u

Very informative. I was able to set right my 20 years old Sony MHC-G50ii mini hi fi component system by adjusting the Potentiometer on CD Drive. Thanks a lot. From India.

I have used this repair method myself, but it gives a good effect, usually for a short time. This involves contamination of the optics, which are not easily accessible, only the lens you cleaned can be accessed, and the increased laser power supply current is also a factor that shortens its life. A proper repair involves replacing at least the mechanism with a set of optics (they are not always easily available on the market - it depends on the model).

Thanks for sharing. Preciuos video. I have 2 cd players with the same problem. I'll try it out and see what happens. Hope it all works like it did for you. Ciao!

Thanks for your video, it really helps in repairing Dvd player !

Nice, thanks, it work after this, i tried to clean it a milion times and that did not do the trick, so thank you for your video

Good tips thank you very much my LG CD player had same issue .now it's working.thanks a lot .

Wow, thanks. My Aristona old CD-player just has one potmeter near the laser that I turned slightly clockwise and it works! It plays all the CD's again without a problem!

Fantastic sir thankyou.this will help me to fix my friends DVD recorder.

VERY HELPFUL !!! Thank you for the wisdom.

Thanks man. I will give it a try with my broken sony cdp 395. take care. Stay safe.

Awesome video!! Totally agree with everything you said. Thanks for your honesty.

Thank you --It worked and saved me from having to take it in to repair for a Minimum of $20.00 to look at it and then the cost of repair.

It worked like magic! Thank you for publishing.

Thank you very much for sharing! My 15 yo Sony DVD player came back to live!

Great Video!! Just threw away 3 Lite-On drives that each said Power Calibration Error! This tip might have saved them. Replaced w/Plextor PlexWriter PX-891SAF drives from Amazon. Will remember this for future use if needed.

Thank you that was very helpful. Now I know what to do for mine.

Wow! You're a genuine genie genius. I have a laptop that is being hit or miss about reading disks, so I am having a hit or miss time in installing the operating system. I have to use the CD/DVD way because its USBs aren't for bootable disks. It's an old laptop. It was working fine at the beginning and that's how I installed an operating system on it, but I want to add another operating system because I haven't gotten the first operating system to access WiFi; it is a Linux operating system and I'm not well versed on it. So I am going to try a partition with good old Windows 10, but the CD/DVD device is being difficult. I was thinking of buying one like it on eBay for only 7 dollars, but I decided to try cleaning it and wiggling it a little and it came back to work but it ran halfway for the WIndows 10 installation disk, it stopped spinning leaving the Windows logo, and it had not done loading all the installation utility to RAM. So, that's what motivated me to look around for ideas on how to fix these mechanisms.

I tried this cuz I found one of his other videos first that showed the same thing. It works! I can't believe it. But I just did it to a DVD player that has been sitting around for years. I think from before I was born and it works now too!

Thank you! Your video was incredibly helpful!

Thanks a lot. My Sherwood CD-5090R CD player works again :) Thanks, thanks..... You are a GENIUS!

Cleaned the lens in mind and its right as rain again for now. Thanks.

Thanks man, worked perfectly on my Sony CD. It was dead since the 90s. Cheers!

I got my car dvd player working with your tip thanks

WOW, you are awesome! Thank you!

Great thanks! I'll give it a try tonight

AMAZING TALENT. tahk u Sir

Thank you for this useful video!

Thank you. Worked a treat on my Pioneer Blu Ray player!

I'll give the dirty lens a try. Yamaha SACD player out of warrantee and two years old. Wish I had bought the extended warrantee offered by Amazon. Sending to an electronic repair shop is a hassle. Thanks for the video.

Thanks for the advice. What screwdriver head would those pot controls normally be?

Good job sir, my best compliments!

good info on the pots. I've had success by just cleaning & reseating the ribbon cable also.

This video is very valuable! 😊

thanks man, Just fixed my toshiba xr-9217 cd player using this method.

Thank you so much. I am going to try that on my old Sony Explode boom box i do for work. The question i have is WHY does the lazer eye NOT read if it is factory reset at the factory? Does the lazer degrade or current degrade? I am going to try this and hopefully save the best boom box i ever had. Thanks so much and RESPECT> RH DSD

Sweet thanks, straight to the point. Now to try it on mine.

Thank you Bud, used this to fix mine ... Works now !!!! Wooo Hoooo !!!!

Great video worked perfectly

Success with my Linn Mimik that had been in storage for 3 years. Thank you.

One can also try to just remove/reinstall the ribbon cable and just hit the pots with a short burst of cleaner; could be that it was just a bad connection. If that doesn't work then you can tweak those pots. Thanks for this info, I've always wondered why those players quit so frequently. Usually people just threw them away. Just out of curiosity, what else did you have to do to that one?

Thank you. Thanks to you, CDP has been repaired.

'Working" Thanks a mille man! Best regards from Belgium

Thank you so much, after obviously cleaning the laser which didn't work, I then tried your suggestion on my lovely old Japanese made JVC UX-T100 micro hi-fi and it worked a treat. This little gem sounds sooo good.👍🎉

Thnk you for the video...I am kind of a beginner with all the electronics and stuff...would you PLZ explain to me what woud measuring the resistance tell you...I didn't really get it...thx again!

THANK YOU SO MUCH SIR FOR YOUR VELUBEL INFORMATION 🙏

My Denon works again! Thanks a million!

Thanks for taking the time and explained with calm all the process. Some people has no patience at all. But you do care to really teach people the Right Way. Thanks

Just tried that it worked thanks a ton

nice video thank you so much its work on my dvd MP pro

Thank you. I just brought an old nad C521i cd player back to life.

It worked perfectly! Awesome 👍👍

I used a can of compressed air and sprayed it into the open CD slot and fixed mine just now. Thx.

Good info, I had few old panasonic cd players that don't read the cd-rw, fortunately I have all the tools and meters to play around so giving it a shot! Not sure if CD-RW support is barred from the chip or at the laser level... 🤞 Update: Nah, didn't work, it's already 20yrs old, didn't want to stress the laser more, it was 8.21 Khz , move it up to 9+ something, then turned back to 8.22 Khz (the variable resistor is very tiny) :P