More info on solving problem: My daughter's laptop (Dell inspiron 1525) had the same issue displaying "time-of-day clock stopped" and I couldn't get it to do anything else including booting from the CD drive. Since she damaged the case by dropping it so the screen/lid can no longer close and I can't ship it out for service (cost to fix lid not worth it) I decided on opening the case myself and replace the battery. I did it and is currently working again. On first boot up I had to go into setup (F2) and reset the clock. Below is a summary of what I did.
There are some plastic "hook tabs" that hold together the case (I broke a few) after the screws are removed. The battery (CR 2032) is located on the motherboard under the left click mouse button. Here are a few screw locations, probably not all because I am writing this after fix and my memory doesn't always serve.
8 screws that hold on funny shape bottom cover.
1 screw in center of opened funny shape cover.
5 screws that hold in a heat dissipater (block of fins and copper flat tube).
2 screws under removable battery. These screws hold on the narrow cover snap lid where power button is located.
2 screws under narrow cover that hold the keyboard in place with remaining snaps.
2 screws under keyboard.
2 screws the hold in the hard drive.
10 screws on bottom of case. I was never able to totally separate the top case from the bottom case but was able to spread front section of cases enough to replace battery.
Very small phillips screw driver.
small regular screw driver.
right angle pick.
small needle nose pliers.
Remember, I had nothing to lose and was accepting the fact that the laptop was a total lost. So you might want to send yours in for professional service.