Laptop won't boot up. Only 3 beeps.

Probably a faulty hard drive. go into the setup screen and verify the HD setting is correct. save your settings and reboot. if this doesn't solve it, then take out battery and disconnect power, remove hard drive and reconnect. try reboot. if none of that works, then replace hard drive and reinstall OS.

Restore Toshiba to Out of the Box Condition
If your model Toshiba laptop has a Restore partition on the hard drive then follow these steps to restore your Toshiba to the Out of the Box condition.
1. Press and hold the 0 (zero) key and at the same time, tap the power button once to switch on
your notebook.
2. When the machine Starts beeping; release the 0 key.
3. When prompted by the warning screen; select Yes to continue with the system recovery.
4. Select Recovery of Factory Default Software; click Next.
5. Select Recover to out-of-box state. 6. Click Next again.
7. Click Next to Start recovery.
8. Restart the Toshiba laptop when there restoration process finishes running. Follow the prompts that appear on the screen to set up the laptop's date, time and language settings.

Restore Toshiba to Out of the Box Condition
If your model Toshiba laptop has a Restore partition on thehard drive then follow these steps to restore your Toshiba to the Out of theBox condition.
1. Press and hold the 0 (zero) key and at the same time, tap the power buttononce to switch on
your notebook.
2. When the machine Starts beeping; release the 0 key.
3. When prompted by the warning screen; select Yes to continue with the systemrecovery.
4. Select Recovery of Factory Default Software; click Next.
5. Select Recover to out-of-box state. 6. Click Next again.
7. Click Next to Start recovery.
8. Restart the Toshiba laptop when there restoration process finishes running.Follow the prompts that appear on the screen to set up the laptop's date, timeand language settings.

1) For first level of troubleshooting i would like to request you to perform the following and please revert what you are getting.
Switch ON the PC, boot the PC in 'Safe Mode' by continuously tapping F8 button after you switch On until you get the Safe Mode Option.

Let windows boot in Safe Mode and log in to windows.

I'm thinking the memory is bad, regardless of which slot you put it in.

Sounds like a problem with the hard drive alright. See if you can boot to a Linux Live CD such as Ubuntu and test if all the rest of your hardware is working correctly. If you can boot successfully to an Ubuntu Live CD then it would prove that the main components of the laptop are still working correctly.

If this is the case, contact the manufacturer of the laptop and see if it is covered by warranty. If not, go to your local PC store with the laptop and ask if they can do anything with the hard drive or provide a replacement.

The error codes of one long beep & 2 short beep Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information.


Do you have access to bios?
If you have access to Bios, I suggest you to load optimal defaults and try booting, It must fix your issue.

If you do not have access to Bios, I suggest you to remove the recently added hardware (if any) and try booting.
If there is no recently added hardware, It-seems that Video (Mono/CGA Display Circuitry) issue, I suggest you to contact near by service center.

Regards

First, check the memory (RAM) of your computer. remove and put it back in. Also checkif therre is only one or two memory sticks in, so you can check on both. It should work fine, and if not, try replacing the memory of your laptop.

Remove and re-seat the memory (RAM) modules.
The task is non-destructive / harmless.

your windows is corrupt ..so you need to re-install it again the OS'