SamyGO

That make sense

Sorry if this sounds ridiculous. But is this particular damaged USB controller chip can be replaced ?

@beatfreak . Internet won't damage a smart TV , does it? The wired connection between xDSL modem and the TV was my fault ,hence the problem occurred. The connected modem were damaged by a lightning strike .TV's Lan interface have been broken all the way.... But I'm wondering why USB ports were the o...

How to get the part number of the mainboard ?
This is the TV official website page :
http://www.samsung.com/ae/support/model/UA55C6900VRXTW
Thanks.

Thanks for replying. unfortunately TV is out of warranty.
So the mainboard itself Couldn't be fixed ?

Oh sorry forgot to mention ,TV was connected to xDSL modem which stopped working after a winter thunderstorm .
maybe surge through lan port ?

USB ports and LAN port stopped working on my UA55C6900 LED TV . when i attempt a network test in main menu i got this message : "The MAC address is not valid .Contact a local Samsung customer service" The MAC address shows a long line of zeros ! And when connecting any storage via USB1 or ...