ee3a84w
Thursday, January 8, 2009

What causes an HDMI cable to over heat?

  • I had my notebook pc connected to my hi-def tv and while trying to get the tv to display the signal, the HDMI cable became piping hot..the whole length of cable..not just the ends..I let it cool down but now I cant get the cable to work with any device ( I usually have it hooked up to my PS3. was it the quality of the cable, or maybe defective? what could have caused the overheating?


  • HDMI cable and interconnects utilize a dedicated +5V power line for the purpose of reading the Extended Display Information Data (EDID) PROM within the sink device typically an HDMI-equipped display.

    The HDMI specification requires all source devices to provide at least 55mA (milliamps) on the 5V line for the purpose of reading the EDID of a display. While 55mA is not enough current to operate most HDMI accessory devices (which typically require about 100 to 150mA), most source devices on the market today provide significantly more current on the 5V line than the HDMI specification requires. As a result, the vast majority of accessory devices can operate when interfaced with a source device that provides more than the required current (i.e. over 100-150mA) on the 5V line. ~ HDMI Licensing Knowledge Base

    If the pin for +5V power line shorts-out at either end of an HDMI connection you will likely experience undesirable (perhaps even catastrophic) results. (See the CE Pro resource listed below.) Therefore prior to connecting your audio-video equipment always check the integrity of the HDMI connectors on your interconnect cables and A/V equipment. There are a few other potential failure mechanisms that may be responsible however I recommend that you start with the HDMI connectors first.

    ################## RESOURCES ##################

    When HDMI Cables Short Out a System
    http://www.cepro.com/article/when_hdmi_c...

    HDMI Learning Center
    http://www.hdmi.org/learningcenter/
    HDMI Licensing Knowledge Base
    http://www.hdmi.org/learningcenter/kb.as...
    HDMI FAQ
    http://www.hdmi.org/learningcenter/faq.a...
    HDMI™: The Digital Display Link
    http://www.hdmi.org/pdf/whitepaper/Silic...
     


  • Although it says HDMI, all HDMI cable aren't optimized/built for the same thing. That, coupled with the quality and craftsmanship, make all cables inherently different. Just like speaker cable, video cable or RCA cable (aud or vid), the materials in its makeup determine the amount of throughput. Too much throughput generates too much heat. Too much heat results in premature failure. Your cable has probably heated to a point where the insulation has failed, causing a wire or two to come in contact with each other, or causing a broken connection in the wire itself. Best bet? Buy another, higher quality/throughput cable.


  • Usually when a cable overheats it is because the current passing through it exceeds the maximum current the cable is designed to carry, it would be a good idea to possibly check to make sure the ps3 is functioning properly because HDMI is a signal cable and not a power cable and it would be extremely unusual for it to become hot like this, even if the cable is of inferior quality.







    • #If you have any other info about this subject , Please add it free.#
    Your name:
    E-mail:
    Telphone:

    Your comments:


    If you have any other info about What causes an HDMI cable to over heat? , Please add it free.
    Posted by jack |

    Recent Posts

    Archives

    Categories

    Blog roll

    Meta