How to make external displays work correctly on toshiba tecra r840-s8420 laptop?
Posted on 2011-10-05
I just bought a tecra r840-s8420 laptop and a toshiba hi-speed port replicator II. This replaced my old hp laptop with its own docking station. The docking station connects to a vga splitter that connects 2 large tv displays and a 19" monitor. This setup worked with no problem on the hp laptop/docking station.
With the tecra I constantly get a connect/disconnect sound from windows, and the screen flash on and off as they external video devices connect and disconnect constantly. It is as if the vga cable is being disconnected from the dock and then plugged back in repeatedly.
I tried without the docking station and after a while the same thing happens when plugged into the laptop directly. For whatever reason, the more USB devices I connect to the docking station, the faster it gives me this problem.
I replaced the computer with an identical model, and had the same problem. I then replaced the docking station with an identical model and had the same problem.
I tried many driver updates from the toshiba site, but none seemed to work. Right, now I have removed the docking station and only have the external vga, usb keyboard and mouse connected to the laptop. It is holding stable, but the last time I did this it took a few hours before it started acting up. If I try to connect my USB printer it starts flashing the screens on and off almost immediately.
I thought it was possible a power issue when connecting too many usb devices, so I bought a usb hub with its own power supply. No help.
The video inside the tecra is integrated intel. I checked the intel site, and tried all the drivers they had available that seemed like it might work with this laptop, as well as the ones on the toshiba site. Everything in device manager looks good.