Troubleshooting a Dejavoo Z11 terminal exhibiting a blank screen and power failure. Analysis includes potential causes, solutions, and preventative measures.
Refer to the device's documentation or the label on the original power adapter.
Cuts, fraying, exposed wires, kinks, or a loose connection.
Try another known working terminal to ensure the problem is limited to the suspected device. Contact technical support for further assistance.
Power failures in electronic devices can stem from insufficient voltage, current overload, or component failure. The Z11's internal power supply regulates incoming voltage. A failure here can cause a no-power condition. External power supplies can degrade, delivering insufficient power. EMV/NFC chipsets require stable power; voltage dips cause errors. External interference (EMI/ESD) can also disrupt power delivery. Diagnostic tests typically include voltage and continuity checks; however, internal probing voids the warranty and triggers anti-tamper mechanisms.
Do not attempt to open the Dejavoo Z11 terminal. It contains anti-tamper mechanisms. Internal access will void the warranty and may permanently damage the device. Use Safe Handling (unplugging) procedures. Ensure the power outlet is properly grounded. Avoid using the terminal in damp or wet environments. Protect device from ESD events, especially in dry environments.
Attempt a 'soft reset' by holding down the power button for 15-20 seconds. Sometimes, this can clear minor software glitches that may appear as a power failure. If the device has a separate power switch, toggle it off and on again. Ensure the power adapter's barrel connector is fully seated in the terminal's power port. Check the power adapter output with a multimeter (if qualified to do so) to confirm correct voltage output.