FAQs - Mooncell - Professional LED Display Control System Expert

FAQs

Q

Unable to Detect Sending Card / Communication Failure

A

Possible Causes:
1. Poor connection of the USB cable, hardware communication failure.
2. Improper installation of the USB driver.
3. Abnormal power supply to the sending card.
4. Loss of sending card program.

Troubleshooting Steps:
1. Re-plug the USB cable.
2. Check both the USB cable and the USB interface on the computer .
3. Reinstall the debugging software (including the USB driver).
4. Replace the sending card.
Q

Error Message Prompted After Opening Debugging Software

A

Possible Causes :
1. Outdated software version.
2. Higher version of the sending card program.

Troubleshooting Steps:
1. Replace the debugging software with a newer version.
2. Downgrade the sending card FPGA version from the -D program to the -B program.
Q

No Image Displayed on the Screen / Shows “DVI Not Connected”

A

Possible Causes :
1. Poorly connected DVI cable.
2. Graphics card properties not set to duplicate mode.

Troubleshooting Steps:
1. Check the DVI cable connection.
2. Set the graphics card to duplicate mode.
Q

Unable to Detect the Receiving Card / No Receiving Cards Detected

A

Possible Causes:
1. Poor or disconnected network cable connection between the screen cabinets.
2. Missing or malfunctioning underlying program in the receiving card.

Troubleshooting Steps:
1. Check if the network cable is disconnected or loose and verify the power supply to the control card.
2. Replace the receiving card with a new one.
Q

When configuring the intelligent settings of the receiving card, it becomes uncontrollable or displays abnormally after the pixel-to-pixel process.

A

Possible Causes :
1. Incorrect selection of module basic information such as chip type and decoding chip.
2. The inherent program of the receiving card does not support the module of the large screen being debugged, and the default common chip is selected as “General-2” for the pixel-to-pixel process.

Troubleshooting :
1. Check whether the module information matches the parameters in the intelligent settings interface.
2. The receiving card defaults to supporting common chips. If special chips such as PWM are used, the receiving card needs to be upgraded.
3. For RC32, select “Enable V50 card expansion mode (1 group of 3 lines).
Q

After confirming that the intelligent settings information and operations are correct, the large screen goes black after sending data.

A

Possible Causes:
1. The resolution of the sending card does not match the video source (graphics card resolution).
2. The calibration function of the large screen is enabled (the large screen has not been calibrated).

Troubleshooting Steps:
1. Verify whether the resolution of the sending card matches the video source.
2. Disable the pixel-to-pixel calibration function.
Q

Abnormal picture position/color/color discrepancies are observed within the cabinet.

A

Possible Causes:
1. Cabinet’s dual/multi-opening/customized HUB port settings do not match the cabinet design.
2. Receiver card operating mode (incorrect selection of data grouping mode).

Troubleshooting Steps:
Re-edit the cabinet program HUB port/HUB address.
Q

Screen/box jittering, flashing white bars, or dot phenomena are observed.

A

Possible Causes:
1. Incorrect cabinet file parameters.
2. Video source input issues (frame screen inconsistency with the sending card)/interference.
3. Optimization required for inherent receiver card programs.

Recommended Troubleshooting Steps:
1. Adjust the cabinet file parameters. Select “Synchronous Refresh” and set the video source frame screen to 60Hz. The data shift clock is recommended to be adjusted to 17.86MHz or below, and the frame change time to 150,000.
2. Re-plug the DVI cable.
3. Replace the DVI cable/replace the sending card.
4. Check the receiver card program version.
Q

After a power outage and subsequent reboot, the screen may exhibit aberrant coloration or an inability to retain programmed settings.

A

Possible Causes :
1. Failure to permanently store the program settings.
2. If specific receiver cards are affected, it could indicate inherent faults within those cards themselves.

Troubleshooting Steps:
1. Re-transmit the cabinet file using the “Send Data to Device” function, followed by “Store Data to Flash.” Alternatively, utilize the display screen connection interface to transmit and permanently store the data.
2. In case of persistent issues with specific modules, repeat the process of permanent storage or consider replacing the affected receiver cards.
Q

After splicing, the right or bottom of the large screen is uncontrolled or displays red, indicating “DVI” not connected.

A

Possible Causes:
1. The loading on a single network port of the sending card exceeds the limit (maximum load of 650,000 pixels).
2. The resolution of the input video source is smaller than the resolution of the large screen.

Troubleshooting Steps:
1. Calculate the loading on a single network card. If it exceeds the limit, reduce it to within the maximum loading.
2. Calculate the resolution of the input video source. Ensure that the resolution of the input video source is greater than or equal to the actual resolution of the large screen.
3. Check if the offset of the video capture/PO, P1 output ports of the sending card is 0.
Q

Blurry or unclear display on the large screen.

A

Possible Causes:
1. The large screen is not displaying pixel-to-pixel with the video source, resulting in up-scaling or down-scaling and causing blurriness.
2. The video source itself is not clear.
3. Improper adjustment of parameters on the large screen, such as incorrect grayscale mode or low grayscale level.

Troubleshooting Steps:
1. Verify the resolution of the video source (e.g., computer resolution) and then enter the “Resolution” window interface to set the “Preset Resolution” of the sending card to match the video source (custom resolution can be used).
2. Replace the video source being played.
3. Check if the parameters of the large screen cabinet drivers are appropriate.
Q

Inconsistency in brightness or color among individual cabinets in the large screen.

A

Possible Causes:
1. Different fixed brightness settings for receiving cards within the cabinets.
2. Variation in receiving card programs within the cabinets.
3. Cabinets are not from the same batch.
4. Insufficient power supply to the cabinets.

Troubleshooting Steps:
1. Adjust the brightness of receiving cards uniformly to achieve the same brightness level.
2. Access the “Hardware Information” interface to verify if all receiving cards are running the same FPGA program. If not, upgrade or replace them accordingly.
3. Inspect the power supply and batch consistency of the cabinets.

Home

Products Center

Solutions

Typical Cases

Services & Support

News & Updates

About Us