Will not read the DVD after it is inserted/not spinning
My unit will load my DVD's and music CD's, but as it attempts to read the DVD's, it starts and stops a few times and then the message" No Disk" appears. Is this a laser lens problem? Is this a motor problem? Is this a problem that I might be able to correct at home or will I need to take it in to have a part repaired or replaced? I would appreciate any help with steps that I might take to try and correct this problem.
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Since you don't indicate what you mean by "won't work", let me provide a few possibilities:
1) You close the door and you can hear the DVD spin, but no reaction on the screen other than some type of "loading" message. This indicates that the optics are attempting to read the DVD but are having difficulties. The operation may ultimately be successful and the DVD may start, but the movie will be unwatchable because of freezes etc. In this case, try cleaning the lens using a cotton swab and alcohol. A dirty lens can cause this.
2) You close the lid and do not hear the DVD spin. In this case, the optics can not even determine that a disc is in the machine. Again attempt to clean the lens. If that fails to at least cause the disc to spin, the optics have failed and need to be replaced.
3) Try a music CD. If that plays OK, but a DVD does not, then the optics are defective and need to be replaced. DVDs require a more powerful laser and will typically fail sooner than CD levels.
There are mainly three motors for most of the DVD players. One to spin the disc we insert in, other to load the laser pickup unit to-and-fro inside it to read the disc and an other one to load the tray mechanism 'in-out'. According to your description, the disc spins inside, and you can hear its spin. So motor which spins the disc has no trouble at all I should say. Then comes to the second motor that moves the laser assembly inside it. If it do not work, the laser pickup unit won't move and no reading will take place and 'No Disc' display will be the result. The last chance is with Laser Pickup Unit itself. Just get this unit repaired by any well experienced service technician or by the authorised service center, because, there are special tools to open this unit. As it is a compactable one, more care should be given to it while repairing. Suspect the second motor I described earlier, and the Laser Pickup Unit. OK.
Loading new device-drivers will not help.
In the first few seconds, the drive is trying to read the first few blocks of data from the media, to see if it is a "data" or "music" or "blank" CD. If nothing can be read (dead laser?) then you get the "insert a disk" message.
When the unit does not load any disk, that is usually because of a problem with the optical laser lens that is dirty, faulty or opaque, and will start operating on certain disks better than others.
In that case you will hear disk spinning, whirring and clicking, but the TOC (table of content track at start of CD/DVD will not be read, therefore the error.
Whe this problem is starting you may be able to read only CD, DVD or Blue ray, or for example only DVD-R and not +R , or only to read and not to write and so on. After more prolonged usage , often the unit goes losing the rest of functions, and ends up not reading anything at all.
If instead there is no noise, and disk does not spin at all , then there is a faulty motor, or the motor micro-switch is bad. This situation is far less common than the lens problem.
Try first using a CD/DVD or Blue ray lens cleaner disk to clean the lens. If that does not work you will need to disassemble the drive , and clean lens directly with q tips and isopropyl alcohol, or to replace the CD/DVD lens, or the whole drive unit.
What you are hearing is the attempt to read the disk. The unti detects that a disc is present and attempts to read it by spinning it first at CD speeds then at DVD speeds. It will attempt this a number of times before giving up and reporting "no disc". If you can get at the optics, try cleaning the lens using a cotton swab and alcohol. Next try to read a CD. If you can read a music CD and not a DVD, it indicates that the optics are starting to fail and need to be replaced.
These units use a belt for the loading mechanism. If the belt slips at all, the loading will not complete and lock. This will prevent the unit from reading the disc. Try loading a music CD. If hte CD plays ok, then the optics assembly is in need of at least a cleaning or replacement.