Question about Toshiba 57HX83 57" Rear Projection HDTV-Ready Television

6 Answers

TOSHIBA 57HX83 NO VIDEO SIGNAL BUT WITH AUDIO - EVERYTHING WITH MENU DISPLAYS - BUT NOT THE VIDEO SIGNALS. I TRIED ALL THE INPUTS BUT STILL THE SAME. PLEASE HELP.

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  • 3 more comments 
  • akuning Oct 19, 2008

    ALL THE CABLES I AM USING ARE 100% GOOD - TESTED FROM A TV BESIDE MY PROBLEM ONE.

    I GET NO VIDEO BUT WITH AUDIO - MENU DISPLAYS ALL OPTIONS AND DOES THE MAGIC FOCUS. WHAT COULD BE THE PROBLEM?

    THANKS

  • akuning Oct 19, 2008

    TOSHIBA 57HX83 - DID RESET AND CHECKED ALL CABLES I AM USING AND STILL NO VIDEO BUT AUDIO ONLY - MENU DISPLAYS ALL OPTIONS BUT NOT THE VIDEO SIGNAL.

    THANKS
    AKUNING

  • akuning Oct 19, 2008

    ATTN: electech1



    I WOULD LIKE TO MAKE SURE THAT WE ARE ON THE SAME MAKE AND MODEL.

    TOSHIBA 57HX83.



    I WOULD LIKE TO KNOW ABOUT THE THE LOCATION NUMBER FOR THAT TRANSISTOR IF YOU MAY. I'LL ALSO CHECK THE CERAMIC CAP.



    THANKS.

  • akuning Oct 23, 2008

    the problem is still the same - NO VIDEO BUT WITH AUDIO - MENU DISPLAYS EVERTHING ON SCREEN - ABLE TO DO MAGIC FOCUS - PLEASE HELP

  • akuning Oct 23, 2008

    the problem is still the same - NO VIDEO BUT WITH AUDIO - MENU DISPLAYS EVERTHING ON SCREEN - ABLE TO DO MAGIC FOCUS - PLEASE HELP

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6 Answers

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  • 306 Answers

How is it connected - what cables do you use? If it is HDMI try unplugging it and plug it back in. Sometimes this will reset the picture. If it's not HDMI then you will need another setting.

Posted on Oct 23, 2008

  • AbdulRahiman S Oct 23, 2008

    You have a problem in the deflection circuits. either hozontal or verticle.


  • AbdulRahiman S Oct 23, 2008

    else try this..
    Unplug the TV and disconnect any HDMI cables to the set. If the issue goes away there is a possibility that your HDMI source is causing the problem. Anything on the HDMI can cause odd problems with the TV since the serial data and serail clock lines are routed on HDMI. Those are the 2 commmunication lines used throught the TV for operation so anything HDMI that might load down one of those can cause issues

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  • Master
  • 6,966 Answers

Hi,

Based on your post/description, it would appear that the internal switching/logic of the unit is faulty. It does not switch/select from one video source to another. This is ganged but separate from the audio electronic selector. In most Toshiba models, this would be the A/V board.

Your options offhand are then rather limnited, open the unit for a look and see. This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Oct 19, 2008

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  • 258 Answers

Check the mode of your tv set if its set to tv or cat it could be in audio mode only check your remot control and try changing it to tv or cat mode

Posted on Oct 19, 2008

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  • 899 Answers

This is some components failing , sometimes leaving the tv unplugged for a while will bring it back for a little while but will go into failing mode again.
the only way to fix this correctly is to replace the bad components or if you still have a warranty use it. otherwise you will have to call a tech.
for the problem of the video it seems one of the problems causing no video or NO PIC is, C511 10NF CERAMIC, or a TRANSISTOR SW
if you would like more info , please let me know

Posted on Oct 19, 2008

  • 6 more comments 
  • jason Oct 19, 2008

    the first thing to do would to be , to make sure all solder on the board that don't look good be resoldered , do all the stuff that gets hot first including the flyback transformer

    i'll be back with some more procedures to make sure we get everything covered before we start taking out stuff , also look for bulging caps or leaky ones or when tested they will be an open

    talk to you in a bit

  • jason Oct 19, 2008

    sorry meant to get this in , the chip ( eeprom ) that switches the video input source should be checked for bad solder , the ceramic discaps any electrolitic caps and the transistors around the eeprom chip

  • jason Oct 20, 2008

    I only have some info on that TV

    I can't pay $30 right now to get the service manual

    but I will help you with what I know

    can you upload a pic?

  • jason Oct 20, 2008

    fact: I have been getting alot of failing discaps lately , just had one in my craftsman drill charger..

    also in the advent tv and all these items that I've encountered have been fairly new items , but some of these electrolitic are drying up , so they don't bulg all the time , they just dry up and become an open (on the DMM diode check).

    I'll be honest its not always that easy to find the problems , I say problems because if something went , it was because another or two has a low value or is done, and checking some of the components in the board is impossible, because you will just read other components values.

    resistors can be read most of the time , transistors can be most of the time and pr's , but it depends on the circut and how it is connected

    be back with more when you let me know what you get after you resolder any solder that don't look shiny or good , also check for brown areas on the board , which could indicate a problem



    electech

  • jason Oct 20, 2008

    quick check : -24v and +24v at the STK conversion chip , to find out what your chip setup is, type it in here and it will give you results for the nte equavalent (PDF file)

    click here :

    http://nte01.nteinc.com/nte/NTExRefSemiP...$$Search?OpenForm

  • jason Oct 23, 2008

    check the tuner fo resoldering as this can also cause the video circut not to function properly

    I'm also doin some research on this problem

    so i'll be back in a bit with more stuff to check



    electech

  • jason Oct 23, 2008

    whats the chassi # ?

  • jason Oct 23, 2008

    have you check the resistors on the stk's be cause if that totally failed then it will not drive any video input to the chips , the menu is driven by one of the stk's , so one of them is surely ok , but the 22 pin one should be checked , the other is an 18 pin connection

    can you find the chassi # on the main board?

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  • 2,035 Answers

You can try a hard reset: Unplug TV from AC mains and remove all cables from TV. Wait about 30 minutes and replug to AC power and redo the cabling. Switch on the TV and see if it works..


good luck...

Posted on Oct 19, 2008

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  • 1,447 Answers

HI-

on the remote, is there a button that will let you change the option or set it to video? Try unplugging the cable as well and try different ports from the back till you get the video. you will have to video source cable and plug it to other available ones. try using a different cable as well if you have spare.

Hope this helps

Posted on Oct 19, 2008

  • Edgar Allan Pagayona
    Edgar Allan Pagayona Oct 19, 2008

    HI-

    Could be the A/V switch on the board itself, or some wiring, and a port problem. better have it check from a servicer.

    Thanks for using fixya!


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