A customer has brought a computer in to be repaired. He said he thinks that the sound card has stopped working because no audio is produced when music, video, or DVDs are played. Which troubleshooting step should you take first? (select two) a. Verify that no IRQ or I/O port address conflicts exist between the card and other devices in the system.
b. Replace the sound card with a known-good spare.
c. Verify that the volume isn't muted.
d. Download and install the latest sound card drivers.
e. Verify that speakers are plugged into the correct jack and are powered on.