the touch buttons on the oled screen don't respond or i have to press them ten times.

Diagnosis

The unresponsive or "ghost" touching on the Canon PIXMA TS6520 OLED interface is typically caused by one of two things: a buildup of static electricity/surface contaminants or a physical separation between the capacitive touch layer and the OLED display panel. Because this printer uses a small 1.42-inch OLED screen, the touch sensors are highly sensitive to the electrical conductivity of your skin. If there is a thin layer of oils, dust, or humidity on the surface, it creates an insulating barrier that prevents the capacitive sensor from registering a press, forcing you to press repeatedly or harder to trigger the command. In more severe cases, the internal adhesive holding the touch-digitizer film to the glass has degraded or shifted. This creates a microscopic air gap. When you press the button, the physical displacement isn't translating to the sensor immediately, leading to the "ten times" press requirement. You can confirm if this is a hardware failure or a surface issue by checking if the screen responds normally after a deep clean; if the buttons are completely dead in specific zones regardless of pressure, the digitizer film has likely failed or the ribbon cable has loosened.

How to Fix It

To resolve surface-level conductivity issues and reset the touch interface, follow these precise steps:

1. Power off the printer using the power button and then physically unplug the AC power cord from the wall outlet to drain all residual capacitors.
2. Dampen a high-quality microfiber cloth with a small amount of 70% Isopropyl Alcohol. Do not spray alcohol directly onto the OLED screen, as liquid can seep into the bezel and short the logic board.
3. Wipe the 1.42-inch screen in a circular motion, ensuring you clear the edges where the screen meets the plastic housing, as grime buildup here often interferes with the touch border.
4. Use a dry section of the microfiber cloth to buff the screen until no streaks remain.
5. While the unit is still unplugged, apply firm, steady pressure (without cracking the glass) across the entire surface of the screen using your thumb, moving from the center to the edges. This can sometimes reseat a slightly lifted touch film.
6. Plug the power cord back in and boot the printer.
7. Navigate to the Setup menu > Device Settings and perform a "Reset settings" to clear any software-level input lag.

If That Didn't Work

• Perform a Hard Hardware Reset: Unplug the printer and hold the power button down for 30 seconds. This discharges the internal motherboard capacitors and forces the touch controller to re-initialize its calibration upon the next boot.
• Check for Firmware Conflicts: Sometimes a pending firmware update causes input lag on the OLED screen. Connect the printer to your PC via USB and use the Canon IJ Setup utility to check for a firmware version update. An outdated version can cause the CPU to lag, making the buttons feel unresponsive.
• Inspect the Ribbon Cable: If you are comfortable opening the chassis, check the flat flexible cable (FFC) connecting the OLED assembly to the main logic board. If the cable is skewed or has a speck of dust in the connector, the signal will be intermittent. Unseat the cable, clean the gold contacts with a pencil eraser, and reseat it firmly.
• External Control Bypass: If the screen is physically damaged, use the Canon PRINT Inkjet/SELPHY app on your smartphone. This allows you to bypass the physical OLED buttons entirely for scanning, copying, and maintenance tasks.

Heads Up

• Avoid using window cleaners or ammonia-based sprays on the OLED screen; these chemicals strip the oleophobic coating, making the screen more prone to fingerprints and touch failure.
• Keep the printer away from high-humidity areas (like bathrooms or damp basements), as moisture can penetrate the OLED bezel and cause permanent "dead zones" on the touch panel.
• Avoid pressing the screen with fingernails or sharp objects; the capacitive layer is thin and can be punctured, leading to permanent ghost-touching where the printer thinks a button is being held down constantly.
• Ensure the printer is plugged into a surge protector. Power spikes can degrade the sensitive touch-controller IC on the motherboard over time.