Promethean Nickel vs. Lenovo V15

[Gongalong]

Hi folks,

 

I've got what seems to be a compatiblity issue between several Promethean Nickel 75" ActivPanel touchscreens and Lenovo V15 (specifically the V15-IIL 82C5 model) laptops.

 

Other laptops are working fine with this touchscreen, but these new laptops won't duplicate or extend output. I've tested via the original configuration where the HDMI cables to go to a wallbox then fly HDMI lead. I've also tried connecting directly. I've tried all three HDMI inputs on the screen. I'm seeing odd behaviour on the laptops in that sometimes the touchscreen doesn't have a resolution shown in Windows, other times it has an "x" in the top left hand corner of the screen within the Intel driver, but other times it does show correctly with the right resolution. Even when it does show as if all is fine on the laptop, the touchscreen says there is no input (it shows an animated "connect cable" screen).

 

I've updated firmware on the screens, and as above tried connecting directly with a short 2m Pro Signal cable. Drivers are fully up-to-date on the laptop at least via Lenovo's System Update and Windows Update, although a friend has suggested going direct to Intel's site (it uses an Intel UHD graphics chipset).

 

Any suggestions on what else I can try? We've got 10 of these laptops, and need them to work.

 

They don't have a VGA output, and I've already been stung by cheap HDMI and USB to VGA converters which are giving mixed results. I'm going to try a more expensive Roline USB to VGA adapter, which also had HDMI output.

 

Thanks for any suggestions, this is driving me batty!

Edited December 12, 2020 by Gongalong