Problem setting up dual monitors

Running Windows 11. I have managed to get both monitors to work from time to time, but at the moment, nothing doing. I can get one or the other of my externals to work. If they are both plugged in, then only one will work. If I unplug the one that is working, the other one will work. I can extend or duplicate, but only with the laptop’s screen, not with the two external monitors. I am completely flummoxed and wish there was a tech support line for this laptop.