Refurb / Apple products related / Apple Laptops' Diagnostic techniques, tips, howto Apple laptops' / macOS manual hardware test howto: keyboard, sound, scree
Keyboard test: Open and use the Keyboard Viewerhttps://support.apple.com/kb/PH25242?locale=en_US1. Click the Input menu in the menu bar, then choose Show Keyboard ...
Refurb / Windows Laptops/Netbook related Disk wipe time USB 3.0 - Eraser
2.5" HDD erase with Pseudorandom Data (1 Pass)500GB 5400RPM : 1.5H1TB 7200RPM: 2.5H128GB Sandisk SSD: 20min256GB Liteon SSD: 15min ...