A computer owner who has not yet encounteredthe fact that the drive does not read discs, is a real lucky one. This problem happens to everyone, the only question is how soon it will happen from the beginning of the device's operation. If you carefully read forums on computer topics, then just a few years ago one of the most popular questions was the following: "Why does not the drive read discs?".
Now, when it is absolutely clearthe tendency of gradual replacement of CDs, DVDs and Blu-ray devices for recording / playback with more convenient flash drives from the market, many users began to forget about the problems of reading CDs. But while there are disks, there will be a problem. This article is addressed, first of all, to the adherents of time-tested technologies. We'll look at why the drive does not read discs and what can be done in this case. Since the causes of this problem can be very different, then its external manifestation is different. Let's start in order.
If you disassemble the drive housing, then inside, undera seat for the disc, you can see a small transparent lens. It is she who focuses on the surface a passing laser beam and captures the reflected laser beam. Initially, when the CD-ROM drives just appeared, the lens was made of special glass. Subsequently, in order to reduce the cost of products, manufacturers replaced the glass with transparent plastic. Although such a product worked properly for a while, but the more intensive the use, the faster the turbidity of the plastic. When you look at such a lens, you can not even notice it, but the subtle ray begins to experience resistance, its path is distorted. The result is that the drive does not see the disk. Producers can be understood: the drive has its own time between failures, the allowed number of read-write cycles. However, many users do not know this and arrange recording at home on a semi-industrial scale. Once again, we emphasize that this also applies to reading. The cost of restoring the focusing system may exceed the price of the new drive, and no one will give a guarantee. Conclusion: if it is determined that the drive does not read the disk due to the lens, then it's time to change it.
The next reason may be to reducebeam power. Since the electronic components of the generating circuit change over time their parameters (degrade), the beam itself changes. On some drive boards, special trim resistors are provided. It is not recommended to turn them on independently. However, even if the beam is properly tuned, the degradation process of the elements on this will not stop, and at any time you can repeatedly encounter the fact that the drive does not read the disks. In comparison with the clouding of the lens, a "seeded" laser is not yet a sentence, but it is necessary to take care of replacement in the shortest possible time.
The modern SATA-interface allowed to abandonbulky PATA cables, but the mechanical strength of the connection was lower. It is enough to accidentally touch the loops in the case or even just to shake the system unit, so that at the place of connection of the serial loop to the device or motherboard there is a violation of electrical contacts. Because of this, the computer can "see" the drive, but it will not be possible to read the disk. The solution is simple: you need to use loops with snap locks.
If the drive refuses to read the disc, all the timeuntwists it and stops it, then the reason may be incompatibility. Although there are standards, they are not always carried out in full. So sometimes it happens that a disc recorded, for example, on a Sony drive, is completely unreadable on Samsung.
In addition, too scratched or dirtydisks are also difficult to read - it all depends on the strength of the beam. And, finally, for reading problems, you should try to remove the emulators of disk drives (Daemon Tools) from the system.
