Can the monitor(Benq xl2546) be infected with a virus?

[longjeang]

The monitor does not have an accessible CPU or RAM.

So what's inside Monitor to control display to turn on or off pixels? I mean, there must be something to receive information from the computer and control the Monitor display according to that information. I just want to know to get more knowledge. Thanks so much for your answer! S2

The logic and memory units inside the monitor are not accessible. The information they receive are the video signals. The video signal is not code. It's data that describes the colors of each pixel.

There are some limited instructions that one can send to the monitor (DDC) for changing things like brightness and such. Most monitors don't support that. However, that's not enough to write a virus.

Finally, some monitors do provide access to their firmware through vendor-specific commands. This is why some monitors can be flashed with a new firmware through a normal DVI cable. In theory, a virus could write code to the firmware that way. But that would need to be a very specifically written virus that targets that specific monitor. And it would require a special OS driver that would allow the virus to write to the monitor's firmware. And even then, if a virus would successfully write code to the monitor's firmware, it can't infect anything else after that. The monitor cannot execute code on the computer it's connected to.

This is a very low yield target for a virus, and quite far fetched.

The information you give is amazing, you are a God! Thank you very much!