Section 5.4 Display Projector Troubleshooting

What could cause 'No signal' on a display?

Incorrect input source or disconnected cable

What should you check first if a projector displays nothing?

Ensure the correct data source is selected

What symptom indicates a burned-out projector bulb?

No image but fan and power are active

What causes a fuzzy or blurry image on a display?

Incorrect resolution or loose connection

What is display burn-in?

Permanent discoloration from static images left on too long

What are dead pixels?

Pixels that do not display any color and remain black

What might flashing screen indicate?

Loose cable or failing display driver

What can cause incorrect color display?

Bad cable, driver issue, or wrong color settings

What is a common cause of audio issues with HDMI?

Audio not configured to use HDMI output

What causes dim image on monitors?

Low brightness setting or aging backlight

What may cause a projector to shut down intermittently?

Overheating or dust buildup in vents

Why is it important to check cabling before other steps?

Cabling is a common source of video issues

What tool can be used to test video output from a device?

Known-good monitor or projector

Why might a display show 'Out of range' error?

Video resolution is unsupported by display

What setting affects color accuracy?

Color profile and calibration

How do you test if dead pixels are stuck or permanently dead?

Use a pixel tester app or solid color backgrounds

Why might a display be flickering only during movement?

Faulty refresh rate or cable shielding issue

How do you resolve burn-in on OLED?

Use screen shifting or pixel refresh functions

What does it mean if a projector image is cut off?

Incorrect aspect ratio or overscan settings

Why would a projector image be upside down?

Projector is in ceiling mount mode

What can cause a monitor to not wake from sleep?

Power saving settings or firmware issue

Why is adjusting brightness and contrast important?

Improves visibility and image quality

What can cause distorted video on screen?

Driver corruption or hardware failure

What might affect color display accuracy?

Incorrect color depth or bit rate

What causes ghosting on monitors?

Slow response time or poor cable shielding

Why would a monitor randomly power off?

Loose power cable or internal failure

What causes horizontal lines on a display?

Video card issue or bad cable

What is one fix for display flickering?

Update or reinstall graphics drivers

What should you check if the external monitor doesn't display?

Enable external display using function key

How do you test a projector's input ports?

Cycle through sources or connect another device

Why is fan noise a concern in projectors?

Overheating or dust accumulation

What causes intermittent audio over HDMI?

Driver conflict or unstable cable connection

What could cause a distorted projector image?

Improper keystone correction or lens focus

What is a sign of a failing LCD backlight?

Faint or dim image with backlight flicker

What is image ghosting?

Faint traces of previous frames on the screen

What causes color banding in displays?

Insufficient color depth or bad media

Why might a new monitor remain black?

Not set as primary display or not receiving signal

What can result in vertical lines across a display?

Failing GPU or damaged display cable

What tool can check video output resolution?

Display settings or GPU control panel

What results from using an incorrect VGA cable?

Blurry or distorted image

Why does a dim image still appear when powered off?

Display residual charge or burn-in

What causes dual displays to be mismatched?

Wrong resolution or extended display setting

What setting allows duplicate screen projection?

Mirror display or clone display mode

What kind of display issue may occur after OS updates?

Driver incompatibility or reset settings

Why might laptop screen stay black but external monitor works?

Laptop screen hardware failure

What could affect a projector’s color output?

Lamp degradation or incorrect settings

How can display burn-in be minimized?

Use screensavers and auto-hide UI elements

Why might audio fail when using DisplayPort?

Audio output not set to DisplayPort device

How do you detect a bad HDMI port?

Test with another device and cable

What should you check if a screen turns off during use?

Power saving mode or overheating