The display panel is a vital part of any Multi-functional Printer. What if there is no display in it? Although you will be able to get printouts and photocopies in the default state, you will not be able to customize the commands. Without being able to see the display you will not be able to control many settings that may include enlarge/reduce the size, image quality, density, collate copies, and much more. Recently, I faced this issue of “no display” in the panel and resolve the problem by following these simple steps.
Unplug the power cable and data cable (USB or Network cable) from the printer end.
Open the display panel that is on the top of the printer. To do so, firstly lift up the top cover of the printer. Now open the two screws as shown circled in the image.
Now you can easily pull out the control-panel display from the top.
Once you have opened up the control panel’s display part, you will see an electronic circuit and a display cable in white color.
Check the cable connection and fix any loose connections in it. Unluckily, it was not the issue in my case but it might resolve the issue in this step only.
Next, you need to reach the other end of the cable. For this, you need to open the printer. You can see in the image, I have marked the covers 1, 2, 3 and 4. So you need to open all these covers. You just have to open/unlock the plastic locks behind these covers.
This is what it will look like after opening the front covers.
Now to reach to the display cable on the logic card of the printer, you need to open the cover on the right side of the Canon MFP 4320.
The next step is to see any loose connections on the white cable (marked in the image). So that was the issue in my case. I just plugged out the cable completely and re-inserted it back to the cable connector.
So, before assembling all the covers, I plugged the power cable back and phew! The display is back ON. Cheers!