On April 16, 2018 at 20:58, sydinstaller said...
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?
Brent probably has hit the correct answer. But the other questions might shed some light, too.
Have you checked the integrity of the grounds?
Then, ? ? re A and B: I'm wondering why A or B might be an issue.
The difference between 568A and 568B is the physical position of the green and the orange wire pairs, and there's nothing in either spec that calls for any particular physical difference between pairs of different colors. Yes, pairs are supposed to be twisted at different rates to minimize crosstalk, but the spec doesn't say which colors get more twists, or how many, than the others, just taht different twist rates must reduce crosstalk to a spec minimum.