Dejavoo Z11 Distorted Image: Diagnostic Report - Solar... | terminalfaults.org

Technical Background:

Image distortion can arise from LCD controller failure, signal attenuation in the display cable, incorrect voltage supply to the LCD panel, or electrostatic discharge (ESD) interference affecting the display drivers. Firmware corruption affecting the graphical output routines is also a possibility.

Symptoms:

Display exhibits image distortion, potentially including pixelation, colour abnormalities, or geometric warping.

Possible Causes:

Damaged or loose display cable connection.
LCD controller malfunction within the Z11.
Incorrect or unstable power supply voltage to the LCD panel.
Firmware corruption affecting the display output.
Electrostatic discharge (ESD) damage to the LCD panel or controller.
Electromagnetic interference (EMI) from nearby devices.

Solution:

1

Safe Handling: Disconnect the Z11 from its power source.
2

Inspect the display cable for damage or loose connections. Ensure it is securely connected to both the terminal and the display panel (external inspection only).
3

Verify the power adapter is the correct voltage and amperage for the Z11. Use a known good power adapter if available.
4

Check for any visible signs of damage to the terminal casing (cracks, dents) which could indicate internal component damage, though do NOT attempt to open the device.
5

Cycle the power: Leave the terminal unplugged for 60 seconds, then reconnect and power on.
6

If possible, attempt a remote firmware update via the network. Consult the Dejavoo support documentation for instructions.
7

Document all steps taken and the results. If the issue persists, contact Dejavoo support for further assistance.

Safety Warning:

The Dejavoo Z11 is a payment terminal with anti-tamper mechanisms. DO NOT attempt to open the casing or remove any screws. Doing so will likely trigger the anti-tamper system and render the device permanently inoperable. Static electricity can damage the internal components. Always ground yourself before handling the device. Safe Handling: Always unplug the device from the power source before inspecting cables.

Prevention:

Avoid placing the Z11 near sources of electromagnetic interference (EMI) such as large motors or radio transmitters.,Ensure the display cable is not subjected to excessive bending or strain.,Clean the touchscreen regularly with a dry, lint-free cloth to prevent the buildup of dust and static.,In dry environments (especially during winter), use an anti-static spray on the surrounding surfaces to minimize ESD.,Ensure the terminal is placed on a stable surface to prevent accidental drops or impacts.

Expert Tip:

Try pressing the 'Clear' button multiple times during the boot sequence. This sometimes clears corrupted display buffers. If available, check if a diagnostic menu can be accessed (consult Dejavoo documentation) that may include a display test function. If the device allows for remote desktop functionality, check the display output remotely to isolate if the problem is internal to the terminal.

Frequently Asked Questions

•Is there an external display port on the device to test with another monitor?

The Dejavoo Z11 does not have an external display port for testing.

•What is the recommended cleaning procedure for the touchscreen?

Use a dry, lint-free cloth to gently wipe the touchscreen. Avoid using excessive pressure or abrasive cleaners.

•What is the voltage and amperage of the correct power adapter?

Consult the Dejavoo Z11's documentation or the label on the original power adapter for the correct voltage and amperage specifications. Using an incorrect power adapter can damage the device.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Is there an external display port on the device to test with another monitor?

•What is the recommended cleaning procedure for the touchscreen?

•What is the voltage and amperage of the correct power adapter?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: