There are a few things we need to know.
- How long is the cable run (CAT cable)?
- How long are the HDMI leads?
- Is it wired as 568B or 568A?
- Are there any joins in the CAT cable? I.E. does it go through any patches points or wall plates.
- Are there any sharp bends in the CAT cable?
- Does the CAT cable run near any power cable?
- Does the issue happen if you connect the source directly to the TV?
- Have you tried a different HDMI port on the TV
- have you tried a different HDMI lead (you will be surprised how often this is the cause)
- Are the cable terminations actually done correctly, and are confirmed ok with a cable tester?
Dan.
