After installing a new IDE DVD drive, no sound plays from music CDs. What should you check first?

When troubleshooting the absence of sound from music CDs after installing a new IDE DVD drive, the first step should be to check the connection of the audio port to the sound card. Many IDE DVD drives have an internal audio connector that links the drive to the sound card in the computer. If this cable isn't properly connected, the audio signals from the DVD drive won't reach the sound card, resulting in no sound output when playing CDs.

Ensuring that this audio cable is connected correctly, or replacing it if damaged, can often resolve these kinds of sound issues. Additionally, verifying the settings within your media player and your system sound settings would be appropriate after ensuring hardware connections are secure, but ensuring the audio port connection is in place is critical before moving to those steps.

Other options, such as checking for CD drive compatibility, examining the power supply, or updating audio driver software, can be relevant if the initial hardware connection is verified and found to be functional. However, in this specific scenario, establishing the audio connection is the most direct and immediate way to diagnose and potentially resolve the lack of sound from the new drive.