Replace hard drive on Toshiba Satellite 1135

I have a Toshiba Satellite 1135-S155. SMART system says hard drive is failing and shuts down computer before it boots up. Sounds like it needs a new hard drive, but I can’t find it (or a repair manual) to replace it. Can you tell me were it is located and how to remove it? Thanks!

The hard drive is located under the DVD drive. The DVD drive is secured by one screw on the bottom of the laptop. Remove the screw and slide the DVD drive out of the laptop. Under the DVD drive you’ll see the hard drive; it’s secured by four screws. Remove screws, slide the hard drive away from the motherboard to disconnect it and lift it up. Not you can transfer mounting brackets to a new hard drive and install it back into the laptop.