Multiple power supply diagrams available for laptops and tablets. Diagrams include Delta ADP-40MH, ADP-90SB, ADP-90FB, and other variants. Power supplies typically operate between 100-240V AC and 19V DC
Laptop overheating occurs when air circulation is inadequate. Blocked bottom fan can lead to component failure. Laptops can overheat to dangerous levels
Use fingernails, credit card, or plastic putty knife to peel stickers. New stickers usually peel cleanly, older ones may require cleaning. Work at sticker-laptop junction to keep it intact
Always turn off laptop and unplug before cleaning. Use microfiber or lint-free cloth, not regular towels. Remove power cord to prevent damage
Internal hard drives are built into laptop tower and work directly with motherboard. External hard drives connect via USB or Firewire cables. Internal drives are faster and more affordable than external drives. External drives offer larger storage capacity and can serve as backup
Laptop screen black occurs due to corrupted graphics driver or LCD display issues. Common after Windows updates with cursor and no display. LED light on, hard drive spinning but no display