Introduction
If your Toshiba S55t-C5225 can no longer read CD’s/DVD’s or will not open then your optical disk drive is most likely not operational and needs to be replaced. The following steps are a guide to help the user in replacing the optical disk drive.
Tools
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            Carefully remove the battery by wedging a plastic opening tool in-between the battery and back cover. 
 
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            Wedge the tip of a plastic opening tool between the back cover and metal frame. 
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            Twist the plastic tool, while wedged, to release the retaining tabs from the frame. 
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            Repeat these steps around the laptop to release all retaining tabs. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.