Fixing Epson L1800 Power Issues: Beeping Noise and Flashing Green Light Explained

Question: My Pro Colored DTF L1800 won’t power on. I hear a faint beeping noise, and there’s a green light flashing from inside near the mainboard. What could be the problem?

Answer:
From what you describe, it seems that the printer’s main power is indeed getting to the printer—thus the green light and the beeping, for instance—but that the control board isn’t completing the activation process, and so the printer is failing to turn on. There could be a few reasons leading to this issue. Here are steps for troubleshooting the issue and possibly resolving it:

Troubleshooting Steps

Check the FFC Connections: First, check for the connection status of the FFC connections between the control board and the mainboard. A loose cable or one that is poorly seated can keep the control board from getting power or signals. Make sure FFC is well inserted on both ends. If the cables don’t seem seated properly, just redo them.

Inspect for Physical Damage: Visually inspect the control board and mainboard for any indications of physical damage, like burnt parts, exploded capacitors, or discoloration. If you have damage, the damaged board may need to be repaired or replaced.

Power Supply Voltage Measurement: Use a multimeter to measure the voltage on the connectors to the control board. An unreliable power source can cause lower voltage due to low power supply. So, if this is the case, if you change the power supply unit, the issue may get resolved.

Check Fuses and Surge Protectors: Many printers have internal fuses or surge protectors located close to the control board to prevent damage from electrical surges. A blown fuse or a blown surge protector can also mean no power gets to the control board. Replace any bad parts.

Reset Firmware or Hardware: Follow your printer’s manual or manufacturer’s instructions to perform a firmware or hardware reset. Software issues are uncommon, but they can block the control board from powering up.

Check the Mainboard: The mainboard regulates the power supply and communication of the printer. Check it for burnt or damaged parts. In the case of the mainboard, it would need resetting or replacement A separate company which is able to perform this service is BCH Technologies, who repair Epson R1390 mainboards. Check mainboard wiring diagram (https://bchtechnologies.com/products/wiring-diagram-for-epson-1390-c655-main-mainboard-colorsun-board-as-in-the-picture?_pos=8&_sid=609aaae05&_ss=r)

Printhead: In case mainboard is repaired or swapped, check the print head as well. If the printhead is damaged it can lead to issues with powering on or operating the printer. BCH Technologies can check the printhead whether it is needs to be repaired or replaced.

Printer issues can be a little tricky to address owing to their hands-on nature. We cannot offer remote troubleshooting, recommendations or support for printer repairs. How do we troubleshoot problem with printer through our location? We provide you onsite assessment and fixing services (https://bchtechnologies.com/printer-repair-service) at our local diagnosis center. Due to the high demand, we schedule drop off on a first-come, first-served basis, and it could take a couple of weeks until we reach your request. Our services are tailored to fix either a complete printer or certain components with the right instructions. We are not the cheapest and would advise yourself starting with self-help and looking online.

To find related videos, go to our YouTube channel (https://youtube.com/@bchtechnologies) and search for them by clicking the search icon. With almost a decade’s worth of content, you’re likely to find a helpful video. YouTube’s recommendations can also send you to other helpful creators. Thanks again for your question and for your support!