Laptops not showing picture

Hey guys, good afternoon. Im loving the monitor so far the only issue i have is, i have a WFH laptop that will detect the monitor but the picture wont show on screen for some reason. I can actuslly play with the settings of the monitor via my laptop when connected but no picture on the spectrum. Anyone have solutions for this?

Hi & Welcome @Malik_Stroman,

It’s nice to know you are enjoying the Spectrum (so are we :wink: )

Please can you confirm what cable you are using to connect the Spectrum to the Laptop and is that the same source that is on your OSD ( Input / Output > Select input source > ‘source’)

Does your Spectrum display a picture when it’s connected via another source?

Please let me know, alternatively please contact support and they should be able to assist you further.

There’s a couple of other bits of info that would be worth knowing.

1. What type of laptop is it?

Windows-based computers have typically had more luck connecting to the Spectrum than Macs do. Intel-based Macs also seem to have fewer problems than M1-based Macs, especially if you’re using a USB-C or Thunderbolt cable.

If it’s a Windows laptop, it’d also be good to know if it’s got a separate Nvidia or ATI graphics chip. The drivers for these chips can make a difference.

2. Does your cable meet the right specification?

Not every HDMI, DisplayPort or USB-C cable is the same. There are several different versions of each, with differences in how much bandwidth is available for sending signals.

If you’re using a HDMI cable, it needs to be rated for HDMI 2.0 or 2.1. There usually aren’t any markings on the cable or plugs to indicate what speed the cable is.

If you’re using a DisplayPort cable, it needs to be rated for DisplayPort 1.4. Just like with HDMI cables, there’s no markings you can use to check this rating.

USB-C cables are even more of a mess. Some are designed for charging only and can’t carry any data. Some have wires for USB 2.0 data, but nothing for high-speed data (USB 3.0 or video). Even if the wires for high-speed data are present, there are multiple speed ratings (5, 10, 20 or 40 Gbps) to deal with and longer cables can have active circuitry that doesn’t play nice with video signals. Some Thunderbolt cables will only carry Thunderbolt video, not the DisplayPort alt mode video used by the Spectrum.

The only completely safe cables are ones rated for Thunderbolt 3 40Gbps, USB4 or Thunderbolt 4, and which are no longer than 1m/3.3ft in length. These will be passive cables (i.e. no circuitry getting in the way) with enough bandwidth to carry the full 4K 120Hz/144Hz video signal.

3. Which firmware is your Spectrum running?

The latest available firmware is version 105, which contains some fixes that might help with the video signal. In particular, it does help somewhat when used with a Mac.

The biggest issue is that you need to have a Windows machine to run the firmware update, and you need to be an administrator on that machine. If your only Windows machine is the WFH laptop, you may not be able to update the firmware.