40m HDMI cable - how to make it work.

[Jolyon_1]

Hi All,
I have a 40m (120ft) in wall HDMi cable connecting my source to my JVC projector.
I tested the cable before installation due to its length and my MacBook worked just fine.
Once installed however my receiver and DVD player do not. I assume this is due to the power of the output signal and signal loss over the cable length (which I am fully aware is too long)
I have tried using booster boxes both passive and active with no luck.

I have a couple of options. One is to try and shorten the cable - I am investigating how much I may be able to remove question is will taking 10m off the cable and fitting a DIY end make matters any better?

Or converting the HDMI cable into CAT cable- and then using Cat5-HDMI

Any other ideas?

 

[budwich]

given that the "spec" for hdmi is about 25ft, you are definitely pushing the limits. Best guess is to make sure you turn off deep color along with trying a lower speed first. Not sure what else. who makes the cable? maybe it is an active cable that is directional.

further, your likely issue beside length is the hdcp requirements. Your macbook probably doesn't use hdcp as computer content isn't protected while the other sources follow the hdcp spec. You are likely having timing and / or error issues which are preventing the signal display... what is the actual error displayed for the connection?

 

[americanaudiophile]

Re-terminating an HDMI cable can be very tricky and might not solve your problem.
You said you tried an active booster (no such thing as a passive booster that I know of). Most of those only work if you put them at the right end of the cable. There are also better ones that are used by installers that are more likely to work (and be more expensive)
https/www.bhphotovideo.com/bnh/controller/home?O=&sku=1029273&gclid=COGnsqjGt88CFcFbhgodBwcGmw&Q=&ap=y&m=Y&c3api=1876%2C92051677442%2C&is=REG&A=details
http/www.hdtvsupply.com/hdmiextenders.html
You can't convert the existing HDMI cable to Cat6. You could replace it with one or two cat6 cables and adapters. The 10baseT ones are the most reliable. There are wireless HDMI solutions if you can run new wire.
Did you try the DVD to the projector directly.? Did you try a short cable for the DVD/receiver just to see if it works. Try a different input on the projector if it has more than one.