The information in this post is provided to assist in troubleshooting. Perform work at your own risk. ENSURE ANY POWER FROM DEVICES HAS BEEN DISCONNECTED BEFORE SERVICING ANY EQUIPMENT. If you do not feel comfortable performing the work, please contact us or your local service center. Be aware that ETC and its Affiliates are not responsible for any damage or injury caused by service of our products by anyone other than us or our authorized service providers, and such damage is excluded from the product’s warranty.
A Congo running version 5.0.x code seems much slower than the same console running version 4.3.x. This is quite visible when scrolling any long list (e.g. the Channel List).
This can be caused by setting the resolution of monitor 1 above the default 1024x768. Monitor 1 runs from the motherboard's integrated graphics, sharing ram with the operating system. Monitors 2 & 3 are driven by a dedicated graphics card and should be fine with increased resolutions.
Reset the resolution of monitor 1 to 1024x768 and do any higher resolution display from the monitor 2 or 3 outputs. Or upgrade the console to at least version 5.1.0 where the graphics handling routines were optimized to help address this issue.