Check graphics card and monitor

For a black screen, artifacts or connection issues

Read the complete step before making changes. Stop if unsure or if new warnings appear.

Start with external checks, not disassembly
This guide checks safely accessible external connections and settings only. Stop if there is smoke, a burning smell or damaged power wiring. Beginners should not remove the graphics card, power supply or cooler. Ask the manufacturer about devices under warranty.
Check 1: Check monitor power and its own menu
Check monitor power and its own menu. Select the HDMI or DisplayPort input actually in use.
Check 2: On a desktop with a dedicated graphics card, the display cable usually connects to the card rather than the motherboard
On a desktop with a dedicated graphics card, the display cable usually connects to the card rather than the motherboard. Check externally only; not every PC has integrated graphics.
Check 3: Turn off the PC and monitor and check the cable
Turn off the PC and monitor and check the cable. If possible, try another suitable cable or monitor.
Check 4: If there is never a picture even during startup, Windows drivers are not the first thing to check
If there is never a picture even during startup, Windows drivers are not the first thing to check. Note beeps or diagnostic lights for qualified help; do not open the power supply or case without suitable expertise.