Dejavoo Z11: LCD Damage and Transaction Impact Analysis... | terminalfaults.org

Technical Background:

The LCD screen is the primary interface for user interaction and transaction verification. Damage can affect the user's ability to confirm transaction details (amount, card type) leading to errors. The Z11's internal firmware relies on user input via the LCD for PIN entry (if applicable) and transaction approval. Signal integrity from the EMV chip reader can be affected by ESD (electrostatic discharge) if the damaged screen allows internal circuitry exposure.

Symptoms:

The Dejavoo Z11 unit presents with a damaged LCD screen. The extent of the damage (e.g., cracks, dead pixels, complete failure) directly correlates with potential transaction processing errors. Visual confirmation during transaction authorization may be impaired or impossible.

Possible Causes:

Physical impact to the LCD screen causing cracks and/or pixel damage.
Pressure applied to the LCD screen during handling or storage.
Liquid ingress causing short circuits within the LCD panel and connected circuitry.
Electrostatic discharge (ESD) from user interaction with the damaged screen.
Cable damage or disconnection between the LCD panel and the mainboard.
Failure of the LCD driver IC on the mainboard.

Solution:

1

Safely Handle the device: Disconnect the Z11 from the power source and network connection.
2

Visually inspect the LCD screen for the extent of the damage. Document the damage with photographs.
3

Check the cable connection between the LCD and the mainboard (EXTERNAL ONLY). Ensure it is securely connected. DO NOT OPEN THE DEVICE.
4

Attempt to power on the device. Observe if any image is displayed, even with damage. Note the display output.
5

If the unit is under warranty, contact Dejavoo support for replacement or authorized repair options.
6

If the unit is not under warranty, consider replacing the entire unit. Replacing the LCD internally is not recommended due to PCI-PTS security measures.
7

Document all steps taken and observations made for audit and compliance purposes.

Safety Warning:

A damaged LCD screen can expose internal circuitry, increasing the risk of electrostatic discharge (ESD) to the user. Safely Handle the device and avoid direct contact with damaged areas. Do not attempt to open the device or perform internal repairs, as this will trigger the anti-tamper mechanisms and void any warranty. Broken glass may be present, so take necessary precautions to avoid injury.

Prevention:

Implement protective measures such as screen protectors to minimize the risk of physical damage. Train staff on proper handling procedures. Secure the device to prevent accidental falls. Ensure adequate spacing around the device to prevent accidental impact. Regularly clean the screen with a soft, dry cloth to remove dust and debris.

Expert Tip:

If the touchscreen functionality is impaired but the display is partially visible, try using an external USB keyboard (if supported by the Z11) to navigate the menu and attempt a test transaction. If successful, this isolates the fault to the touchscreen component of the LCD assembly. Check the device documentation for external keyboard compatibility.

Frequently Asked Questions

•What is the warranty status of the Dejavoo Z11 unit?

Check the purchase date and warranty documentation to determine if the unit is still under warranty. Contact Dejavoo support for warranty claims.

•Has the device been exposed to any liquids or extreme temperatures?

Inquire about any incidents of liquid spills or exposure to extreme temperatures, as these can contribute to LCD damage.

•What is the frequency of cleaning and the type of cleaning solution used on the screen?

Improper cleaning solutions can damage the LCD coating or cause internal damage. Use only approved cleaning methods.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the warranty status of the Dejavoo Z11 unit?

•Has the device been exposed to any liquids or extreme temperatures?

•What is the frequency of cleaning and the type of cleaning solution used on the screen?

Related questions

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Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: