We have never seen a CPU or memory failure. Motherboards are another matter. Some vendors are to be avoided entirely. Most OEM warranties must be administered through the distribution chain. That means that you will need help from LSNet.
Advanced replacement is available on certain products from certain manufacturers.
In these cases, a credit card is required. In our experience, advanced replacements normally arrive in less than a week. Advanced replacement is available from LSNet but there will be a fee. You must negotiate that fee at the time of replacement. Often the make and model of advanced replacements from LSNet differs from the original product.