Dell Precision M6600 graphic problem

Hello,

I have an old Dell Precision M6600 workstation laptop running Windows 7, still in pretty good shape. In the past I had upgraded the hard drive to an SSD, added more memory, added a second SSD and a solid state memory card.

I purchased this laptop from new back in 2013. I have some software that I want to keep using and I really can't afford to by the latest versions of the software. I use the laptop mainly for hobby work (creating 3D CAD stuff for crafts, art and to send to my 3D printers). For my freelance business I did purchase a new Dell workstation laptop running the latest version of 3D CAD software. This one I use for serious business work.

The problem I’m experiencing is distortion, or graphic noise, on my right monitor. I saw this with my old monitors I purchased at the same time as the M6600. I recently replaced the old monitors with new Dell monitors. When I run my Dell 7670 workstation laptop, through a KVM, the monitors are fine. No issues there. When running my M6600 laptop through the docking station I get the distortion on the right monitor. I’ve tried three docking stations, all the same model, two had this problem. The original the right side was dead, monitor did not display. I thought maybe the graphic card could be the problem but I’m not sure about this. I have another M6600 that works and I tried this on the same docking station. The same graphic problem appears with this laptop as well.

The first image shows both monitors. You can see the right monitor with the blue distortion compared to the left monitor. The second image is a closer shot of the right monitor.

I do have a couple of cables I can try and see if this could be the problem. One cable is a DVI to HDMI, the other cable is a Display Port to HDMI. I’ll update this post if it turns out to be a cable problem.