I have the same problem as many here, my HL-DT-ST re/dvd GCC-4240N on a Compaq Presario 900 series will happily read DVDs but will not read CDs.
I tried a lens cleaner (the only thing suggested by my support) with no improvement. I don't understand firmware and what it does, i downloaded the zip file from http://forum.rpc1.org/dl_firmware.php?category=15&manufactor=16
but I am a little nervous of opening it after reading the disclaimer, can anyone either walk me through what exactly i need to do, i.e. do i need to install it in a particular place or carry out any particular instructions.
Or does anyone have any other specific advice on how to fix this problem, there seems to be a hell of a lot of different pieces of advice depending on the model.
Alternatively, i have looked at buying a new one of these, and i am finding similar products between £30 and £300 and just don't know what i am looking for and why the prices vary so much and if i do buy a new one, can i just take the old one out and stick the new one in and it will work??
Thanks very much for any help you can give.