Can't change boot sequence in Dell 2100

I have an aging Dell Inspiron 2100 that won't boot. I get the Dell Logo and F2 option. All that seems to work fine. I tried to boot from a CD-ROM per Dell's Doc # 147738 (see below). But, whenever I select "BOOT" in the setup and follow the instructions in the Dell Doc, all I get is a beep with a message: " All the items in this menu cannot be modified in user mode. If any items require change, please consult your system supervisor." Well, it's my PC and I guess that makes me the "supervisor." There is no supervisor PW in the setup. Any suggestions would be most appreciated. If there's a hidden supervisor's PW, can someone tell me where to find it? Haven't used this PC in several years. Think pulling the CMOS battery out and replacing it might help?

Thanks and regards,

PJF

P.S., sent this also to Dell Tech Support but got no response!

How do I configure my Dell Inspiron 2100, 3000,

3200, 3500, 5000, 5000e, 7000, or 7500 portable

computer to boot to the CD drive?

Table of Contents

1. Enter the BIOS to change the boot order of the Dell Inspiron 2100,

3000, 3200, 3500, 5000, 5000e, 7000, or 7500 portable computer to boot to

the CD drive.

1. Enter the BIOS to change the boot order of the Dell Inspiron

2100, 3000, 3200, 3500, 5000, 5000e, 7000, or 7500 portable computer to

boot to the CD drive.

To change the order of your system boot devices, perform the following

steps:

Power on the computer. 1.

System Setup.

2.

Normally the CD-ROM is listed as the third boot device.

4.

The CD-ROM entry moves up one slot.

5.

The CD-ROM entry moves up to the top position.

6.

Insert the CD you intend to boot from into the CD drive. 7.

The Save changes and exit now prompt appears.

8.

Your computer will now boot to the CD inserted in the CD drive.