At computer startup I received a message saying CMOS battery low and prompting to set the date/time.  Following the instructions provided courtesy of this website (thank you!) I replaced the CMOS battery.  Now when I try to start it, the SCREEN first shows the logo of the company that built the machine, then it goes through some process where it is looking for a DHCP, then it comes back showing the MAC address and says:

PXE-E53: No boot filename received
PXE-M0F: Exiting Intel PXE ROM
Drive Not Ready - System Halted

Any suggestions for how I could get this working?  I think it was running Windows 2000 (it's a co-worker's machine).

Thank you!can you get into BIOS?It is trying to boot from the network(PXE is a network boot).  Is this what you want it to do?

If not you need to get into the bios and change the boot order.I was able to get into BIOS.  What do I need to do to change it from a network boot?  The Boot Device Priority lists the 1st boot device as Removable Dev., 2nd is hard drive, 3rd is CD-ROM, 4th Intel UNDI, PXE.  Does that mean it's not reading the hard drive and skipping to the 4th device?Yep, that's exactly what that means.

So now you need it to detect your hard drive.  There may be some autodetect features in your BIOS.  Once it finds the hard drive it should be able to boot to it.  This, of COURSE, assumes that you have an OS installed on your hard drive.

BIOS shows that the IDE type is set to auto but says the primary IDE master is not installed (nor is the slave which this computer doesn't have anyway).  I checked the interface cable and the power cable and they seem to be connected properly.  Is there any other way to get the hard drive recognized?  I started to think that MAYBE one of the cables had gone bad -- could something like that cause a low CMOS battery message?

By the way, I really appreciate the help.  I TEACH in a public elementary school and our school's budget took a nosedive so we had to discontinue our contract with our tech people.  I teach computer applications so somehow that makes people think I am a computer guru.  So, thanks!!CMOS battery is like the battery in your wrist watch.  It keeps the clock going and the BIOS settings saved to CMOS memory.  However, it's only used when the computer is unplugged and/or off.  As long as any changes you've made in BIOS are remembered (after you turn computer off), battery is working.  IDE (auto) should recognize the hard drive. Remove the 2 cables to it and then plug them back in.  This action can "clean" or "wipe" the contact surfaces.  A bad cable will have no effect on the CMOS battery.

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Compared to them...you are!