How to Fix a Printer that Won't Turn On After Printhead Cleaning (Blinking Lights Issue)

Question:
I successfully cleared a clogged printhead, but after reinstalling it, I noticed cleaning solution on the ribbon cable connections. Initially, my printer displayed two blinking lights, then completely stopped powering on. I only realized the cleaning solution was present after disassembling it again. Can this printer still be repaired?

Answer:

What Likely Happened

When cleaning solution (particularly if it's water-based or conductive) remains on critical areas such as the ribbon cable terminals or printhead connector, it can cause a short circuit once power is applied. The two blinking lights you initially saw were indicators signaling a fault condition. Unfortunately, if the mainboard experienced a short or electrical surge, it could explain why the printer no longer powers on.

Steps to Fix Your Printer

Here’s what you can do to diagnose and potentially fix the issue:

Step 1: Completely Unplug the Printer

• Disconnect all cables, especially the power cable.

• Allow your printer to sit unplugged for at least 24–48 hours. This helps residual moisture evaporate and capacitors on the mainboard discharge completely. Occasionally, this reset can restore the printer’s functionality if no permanent damage has occurred.

Step 2: Inspect the Mainboard (F1 Fuse and Power ICs)

• Open your printer’s housing to access the mainboard.

• Locate the F1 fuse on the mainboard. Using a multimeter, test the fuse for continuity.

• If the fuse has blown (indicated by no continuity), replace it with a fuse rated identically. Be aware this requires soldering skills.

• Carefully check the board for any visible signs of damage, discoloration, or burnt areas. Any visible damage usually indicates the need for more extensive repairs or board replacement.

Step 3: Check the Printhead Ribbon Cable and Connector

• Ensure the ribbon cable is dry and free from cleaning solutions. If terminals appear corroded or dirty, gently clean them using isopropyl alcohol.

• Allow ample drying time before reinserting the cable.

• When reconnecting, confirm the cable is properly aligned—not inserted at an angle or backward.

Step 4: Replace Damaged Components if Necessary

• If your inspection reveals damaged ribbon cables or connectors, replacements will be necessary. Damaged parts typically cannot be reliably repaired and must be replaced entirely.

Addressing printer issues can indeed be quite complicated due to their hands-on nature. Because of this, we're unable to offer remote troubleshooting, specific suggestions, or support for printer repairs. However, we provide an in-person evaluation and repair service at our local diagnostic facility (Printer Repair Service). Please note, our repair service operates on a first-come, first-served basis and may require a few weeks before a printer can be scheduled for drop-off. Our facility is equipped to handle full printer or specific part repairs, and we clearly outline each procedure. Nevertheless, we recognize our pricing may not be the most economical, and thus strongly encourage self-help troubleshooting through online research. Start by searching our YouTube channel. You can efficiently find relevant videos using the search icon next to "About" on the right-hand side of our YouTube page menu. Given the extensive video library we've built over the past nine years, this search feature is the quickest way to access targeted solutions and might also lead you to helpful videos from other creators.

Thanks again for contacting BCH Technologies—we truly value your support and hope these steps help you resolve your printer issue!