One glows when it is turned on, the other flashes when data is being transferred. It comes with one of the best installation guides I have ever seen. It would be easy for a beginner or an old pro to install a ZIP drive. You should be up and running in 10 to 15 minutes. All you do is follow the 10 simple steps.
Every computer has a battery connected to the motherboard.
It provides the power to allow the computer to remember what kinds of hardware is installed and how it is configured. If the computer forgets, it stops operating. The CMOS information keeps track of the date, time, memory, type of hard drive and all other hardware requirements. If your battery fails for any reason, and the CMOS loses the system information, it will not be able to boot from the hard drive. You will be required to run the Setup program and re-enter the information CMOS stores.