There is a research paper on the subject "No Privacy in the Electronics Repair Industry" from 2023 https://ieeexplore.ieee.org/document/10179413 https://ieeexpl

There is a research paper on the subject "No Privacy in the Electronics Repair Industry" from 2023 https://ieeexplore.ieee.org/document/10179413 https://ieeexplore.ieee.org/document/10179413 TLDR: Researchers visited 11 service providers in Canada to replace a laptop battery. 10 out of 11 service providers requested OS passwords, 8 stored the password in their database and 5 printed the password on a sticky note and attached it to the device. In the second part of the study, the researchers prepared laptops with an easy-to-fix problem, some revealing pictures on the disk and custom logging software. In 6 out of 16 cases, the photos were opened and viewed and in 2 cases, logs were missing.