At this point, this means your hard drive or cdrom drive has failed. Restart and immediately start tapping the F2 key on the keyboard, you should see a BIOS screen come up (although it may take some trial and error, if it doesn't work with F2, try F12, Delete, or Esc, one at a time).
In BIOS, either on the main tab, or inside Advanced BIOS features, you should be able to see if the hard drive is detected and listed there, here are some examples:
If it does detect your hard drive, not just the DVD/CD drive, stop here and let me know.
If it doesn't detect the hard drive, for example, it says none or not detected, try these further steps:
Make sure no cds are loaded. Turn off the computer, and disconnect the battery and AC adapter from it. Wait a few minutes, then press and hold the power button for 60 seconds and release it. Proceed to connect the ac adapter with the battery, and turn the laptop back on.
Re-enter the BIOS, and look for the option at the bottom of the screen to "reset the BIOS to defaults" or "optimal defaults" option.
This option is usually shown along the bottom of the screen where all the navigational directions are listed. Then save and exit. Now see if windows will boot up correctly.
If it still doesn't boot up, you will need to replace either the cd or hard drive. To know which one, please refer back to the BIOS to see which one is not detected. Normally these can both be removed by removing the larger panels on the back of the laptop.
Then you can call 1-800-426-7378 to order a replacement hard drive or cdrom for your model. You will also need the recovery disk that came with the computer, so that you can reinstall Windows on the new hard drive.
If the recovery of data on the current Hard Drive is important to you, what you will need to do is pull out the hard drive and then stick it in a usb hard drive enclosure for the desktop/laptop (you can get these at any nearby computer/electronic store).
You'll want to plug this enclosure into a working computer, and then you will be able to copy over all your files to it. Your user files will be located under C:\Users\[your profile name]\ or C:\Documents and Settings\[your profile name]