A new logic board costs as much as a new computer. Hard drives are impossible to replace, RAM upgrades are hard, and even opening a Mac or iPhone voids your warranty. Not to mention all their nonsense with macOS upgrade requirements, batteries, and so on.
Logic boards are indeed expensive, and primary components are soldered directly to the logic board of portable computers. Opening your device absolutely does not void your warranty. Using a third-party part does not void your warranty, other than its application to the third-party component, or damage as the result of a non-AASP repair.
A new logic board costs as much as a new computer. Hard drives are impossible to replace, RAM upgrades are hard, and even opening a Mac or iPhone voids your warranty. Not to mention all their nonsense with macOS upgrade requirements, batteries, and so on.
Logic boards are indeed expensive, and primary components are soldered directly to the logic board of portable computers. Opening your device absolutely does not void your warranty. Using a third-party part does not void your warranty, other than its application to the third-party component, or damage as the result of a non-AASP repair.
https://www.apple.com/legal/sales-support/terms/repair/Retail_Repair_US_Terms_Conditions.html