After playing a cd in unit will no longer read DVDs

Sometimes it is due to a dirty read lens in the unit. More often it is due to newer DVDs having newer security encryption algorithms that the older units are not compatible with. You may want to check to see if there are any firmware upgrades for your unit that may bring it more up to date on the current encryption standards.

It is most likely a permanent fault as CDs and DVDs require the laser to focus differently. If the unit is a few years old it will not be viable for economic repair.

Try installing a new software program to play your DVDs. Also look for updated dvd player drivers from Acer site.

If your using copies then some dvds wont read them even if the old one did, sometimes its a gamble if it reads or not, if your using a master then i would have them check it out, it may be bad or need programing, it funny because sometimes it will play a copy and sometimes not, thats what i've run into. hope this helps.

The 4600 has PowerDVD to play DVDs (You should have the software CD to install it on the 3000) DVD burning software would be Roxio/Sonic, and you should have that CD too.
If you don't have the CDs, then try download.com to download Free player software and Burning software

The messagin indicates that the unit recognizes the a DVD is present. Since it goes that far, it suggests that the information read from the disc is wrong. A dirty lens can cause this. Use a cotton swab as Welcomjee suggested dampened with alcohol. If that does not resolve the problem but a CD will play, then the optics are failing and need to be replaced.

Given the cost of replacement optics for your unit, if the optics are bad, replace the unit.

Dan

When the CD/Dvd Drive becomes old the Optical Lense is not strong enought to read DVD because DVD is more dense than CD track. You can Try to clean the lense. There are lense cleaner available on the market.

then i think the lens is not able to read the disk.

and so i would suggest you to buy a disk cleaner CD and run it in your DVD player and then use your regular disks.

if this is not working then it is some internal fault in your DVD players lens.

it means you lens is very week and need some replace by buy a need cd/dvd rom to make it play

This is usually caused by a faulty laser.

Most DVDs have two lasers. One for DVD & one for CD.

Sounds like the CD laser has failed.