Are HDMI Cables Lightning Rods? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 6 Old 07-10-2014, 05:11 PM - Thread Starter
Newbie
 
yobil's Avatar
 
Join Date: Nov 2013
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 10
Are HDMI Cables Lightning Rods?

I have a Panasonic Plasma TV that recently had the main board replaced because one of the HDMI ports went bad. The technician that did the work said that it may have been a lightning strike nearby that caused the problem. He said that HDMI cables are extremely sensitive to electromagnetic waves, acting like an antenna, that can cause this kind of damage. He further stated that there is nothing that can be done about it short of disconnecting them when a storm is nearby. Was he correct?
yobil is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 07-10-2014, 08:49 PM
Senior Member
 
TahoeDust's Avatar
 
Join Date: Oct 2007
Posts: 394
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Liked: 20
I don't know if they are or not, but my brothers house was hit by lightning last week and 4 out of 5 TV's went down. One completely, and 3 just the HDMI connections stopped working. The TV's that lost the HDMI boards still function fine when hooked up through component or coax.

Samsung PN60E7000
Sony HT-CT770
Custom HTPC - 3.2GHz/8TB/8GB/HD5670
TahoeDust is offline  
post #3 of 6 Old 07-10-2014, 09:23 PM
"Don't PM Me Bro"
 
RandyWalters's Avatar
 
Join Date: Feb 2003
Location: El Segundo, Calif
Posts: 17,579
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 133 Post(s)
Liked: 513
Quote:
Originally Posted by yobil View Post
I have a Panasonic Plasma TV that recently had the main board replaced because one of the HDMI ports went bad. The technician that did the work said that it may have been a lightning strike nearby that caused the problem. He said that HDMI cables are extremely sensitive to electromagnetic waves, acting like an antenna, that can cause this kind of damage. He further stated that there is nothing that can be done about it short of disconnecting them when a storm is nearby. Was he correct?
The HDMI cables aren't the lightning rods, but they do carry the surge that originates from the cable box or satellite receiver when lightning strikes at or near the equipment outside or the wires in the neighborhood. Lightning seems to be the biggest cause of a TV's HDMI board failures. Even hot-swapping an HDMI cable from a set top box can sometimes fry the HDMI board in the TV. Some people have even reported seeing a tiny arc when connecting an HDMI cable.



______________________________

Randy
Sony 55W800B, Panasonic TC-P55ST60, TC-P50GT50, TC-P46G10, TH-42PZ700U, TiVo Series3 & Premiere, TWC Cisco 8742HDC DVR, Onkyo TX-SR333 AVR, URC R40 Remote.
Pic of My A/V setup - http://cdn.avsforum.com/f/f1/900x900..._Img_4867.jpeg
Gallery - http://www.avsforum.com/g/a/2082686/randywalter...
RandyWalters is offline  
post #4 of 6 Old 07-11-2014, 05:14 AM
Advanced Member
 
bac522's Avatar
 
Join Date: Jan 2003
Posts: 910
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
Liked: 53
Any cable plugged into any device that utilized any type of external service (electricity, cable, ota, etc) is a lighten rod if the lightening is near enough or a direct hit...we're talking 10 million to 120 million volts in just one strike...transient surges are very common with nearby lighten strikes!
bac522 is offline  
post #5 of 6 Old 07-11-2014, 09:03 AM - Thread Starter
Newbie
 
yobil's Avatar
 
Join Date: Nov 2013
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 10
Thanks for the comments. So. I guess that HDMI cables (connections) are no more or less susceptible to lightning damage than any other. Is there a best strategy for protecting your equipment? Are surge protectors really that useful? Unplugging is probably best, but it is certainly a hassle to loose all cable box and TV settings.
I appreciate your comments and suggestions.
yobil is offline  
post #6 of 6 Old 07-11-2014, 11:42 AM
AVS Special Member
 
Otto Pylot's Avatar
 
Join Date: May 2004
Location: San Jose, CA
Posts: 7,782
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 316 Post(s)
Liked: 286
If your house gets a direct hit, there's not much that can protect your equipment. I know there are whole house surge protection etc that can be installed but being as I don't live in an area with weather that severe I can't recommend anything. Hopefully others who know can post recommendations.
Otto Pylot is offline  
Reply HDMI Q&A - The One Connector World

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off