Hi, what do you want to change?
SSD or RAM?
If you want to replace the SSD or RAM, you have to open the bottom case of the computer with a screwdriver.
CPU Specifications:
https://www.intel.com/content/www/us/en/products/sku/212328/intel-celeron-processor-n5105-4m-cache-up-to-2-90-ghz/specifications.html
CPU Specifications:
https://www.intel.com/content/www/us/en/products/sku/208658/intel-core-i51135g7-processor-8m-cache-up-to-4-20-ghz/specifications.html?_escaped_fragment_==www.intel.com-%23