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Problem
The computer turns on, but the monitor does not display an image.
Symptoms
Monitor displays "No Signal."
Blank screen.
Computer fans run but no display appears.
Screen flickers.
Display disconnects randomly.
Issue only affects one of multiple connected monitors.
Possible Causes
Loose display cable.
Wrong input source selected.
Faulty HDMI/VGA/DisplayPort cable.
Graphics card problem.
Monitor failure.
RAM connection issues.
Computer stuck during startup before sending a display signal.
Resolution
Step 1
Check monitor power.
Step 2
Confirm the correct input source.
Step 3
Disconnect and reconnect display cables.
Step 4
Test another cable.
Step 5
Connect the monitor to another computer.
Step 6
Reseat RAM modules.
Step 7
Check graphics card connections.
Step 8
Listen for startup beep codes, which may point to a graphics or memory fault.
Prevention
Use quality display cables.
Avoid damaging ports.
Keep graphics drivers updated.
Protect equipment from power surges.
Avoid unplugging cables while the computer is running.
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