you can go to the troubleshooting page to troubleshoot any possible problems you have with the device.
The LT41P10u laptop is a part of the LT series of laptops by Gateway. Released in 2014, It has a 10.1 inch touch screen, A 320 gb HDD Hard Drive, A 1.6 GHz Intel Celeron Processor, and 2 GB of DDR3 RAM.
You can go here and go to the specifications tab to see more hardware information.
newegg.com is a common place to look for replacement parts and accessories. Just type "LT41P10u" into the search bar to see what they have in stock.
Here is the Amazon Product Page.