https://www.bootlayer.com/ daily https://www.bootlayer.com/pdf/Dell/3000/dell-optiplex-3000-micro-service-manual-en.pdf https://www.bootlayer.com/pdf/Dell/3000/Dell-OptiPlex-3000-Micro.pdf https://www.bootlayer.com/pdf/Dell/3000/optiplex-3000-micro-technical-guidebook.pdf