i have an acer travelmate 4070 series (4270LMI, PIV, 1.7GHz, 512MB RAM, 60 GB HDD, DVD-dual double layer ( support dvd+r double layer/dvd+- rw). my dvd is working fine before last week. one day i tried to read a scratch cd but it can't. then i take out from the drive and i replaced with other then suddenly my laptop shown the cd is blank. i tried with all other kind of cds but all shown blank. but it works fine with audio cd. when i insert any cd, it shows it as iff it is blank and try to write on it. when i tried to write on it, it said invalid cd.
but the standard cd (like driver cd, executable cd but not recorded as data cds) works fine and read and can copy from the cd. the dvd-drive can read the dvds also.
i have also done twice factory configuration but the problem does not solve. so anyone can help me? i need your help. i am trying to format my HDD but i worry if it not work. the cd drive also does not boot from bootable cd.

Welcome to PC Help Forum.

Let's try a simple fix first.Go to Device Manager and rightclick on the DVD drive > select Un-install and then re-boot. See if that makes a difference.