Is it OK with the usual 6 foot HDMI cable?
Relocate the cable box since coax usually can stand 50 feet or more.
Recently replaced old Samsung LCD T.V. with good picture with Sony 4K T.V. Comcast Standard Cable Box in use with about 40 ft hdmi cable run through wall. Now the picture has intermittent noise/"snow". Also, T.V. has delay in locking on to signal. What is a good inexpensive solution for my problem? Thank you.