I am currently trying to repair a pen-tablet-monitor, which has what i call a 'blind/dead row'.
Meaning that i can draw everywhere, but there is this one row, where any input is either picked up by a row above, or below.
I visualize what a drawing would look like:
The red strokes symbolize the borders of the 'dead row'.
I stumbled upon this video fixing dead areas on graphics-tablet
and tried cleaning any connections using isopropanol, but it didn't solve the issue.
But i took a closer look and found something, which seems strange to me. On the PCB that receives input from the sensor-board via a ribbon-cable(34P), there seems to be a solder-bridge between two of the pins. I tried my best taking a picture of it:
Now to my question (finally):
Might this not be something which is done by accident, but something that is actually fulfilling a purpose?
Are there cases, where something like this is used consciously (i.e. soldering together two pins directly after the interface)?
I really don't want to de-solder this connection until i can be reasonably sure, that it is the unwanted solder-bridge that i think it is.
edit: I was asked to provide further(better) images, and here they come: Also this time i took a closer look at the pcb, and well... these two pins don't even have two separate traces, but one connected.. at least this is what my nooby self is seeing.