Question about Pioneer PRO-710HD 64" Rear Projection Television

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Pioneer Pro-710HD Rear Projection TV with no picture or sound.

When the unit is turned on, the green "On" light comes on, but there is no picture or sound. The unit started acting up as long as a year ago. Without warning the unit would loose the picture and sound, but the green "On" light would stay on. After a minute or two there would be a loud pop and everything would be back to normal. This would happen maybe once every two months, and I did not worry about it. Starting maybe 3 months ago the picture and sound did not "pop" back on within a couple of minutes and turning the unit off for ten minutes or so seemed to do the trick. It progressed to a number of days. Now I have not had a picture or sound for about a weeK just a green "On" light. Can you guys help? Thanks.

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  • jmillham Nov 24, 2008

    Smarttech - Thanks for your help. Can you explain how I can test to confirm your diagnosis? Can you tell me where I can get a manual to guide me in fixing the problem. I am also interested in the opinion of other experts to confirm your diagonsis. Thanks again.

  • jmillham Nov 24, 2008

    Thanks Findmeifucan. You guys have to understand I do not have a manual. I have no idea where the fuses are or what a hard reset is. It would be helpful if you can be more descriptive. Thanks.

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Hi there...

Sounds like you either have issues with a burned out capacitor, or your power transformer has finally croaked. Most likely the latter of the two. Generally, when you turn on your TV, your power transformer will power-up and once the transformer is ready to kick on, you'll hear a click, and then your TV will come on. However, after a while these transformers start to go bad and what was once a "click" is now a "pop". Once it's completely fried, your set will appear to come on, but you will not get picture or sound even if you hear the, now normal, "pop". I suggest having a local TV repair center give you an estimate on how much it'll cost to fix it, that is, unless your TV is still under warranty. Hope this proves to be useful and have a nice night!

James

Posted on Nov 25, 2008

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HI,

Check the switch relay if it fuctions well. In the switch panel try also check any resistor or capasitor that burned and if any, replace it. Hope this could help. Please dont rate me if it would fix your probelm. Thank you.........

Posted on Nov 25, 2008

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It sounds like the colorwheel went out on the tv

Posted on Nov 24, 2008

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Dear Sir/Madam,

Pioneer Customer Support: (800) 421-1404

Have you done a hard reset of all functions? (Unplug the power cord and let the set rest for 1 full hour; then try again).

Have you switched all the controls according to the proper settings - as given in the owners manual?

In the worst case the drivers for the display or the display itself is defective. In which case you will need a service tech to analyze the internal circuitry with instruments to find out the cause of no picture.

BUT: First, try checking for picture with dvd or vcr input.
If you are getting a picture in some other input or mode you may try again with tv and be able to solve the problem.

Let me know if you need further help.

thanks
good luck

Posted on Nov 24, 2008

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Hi and welcome to FixYa,

Initially, what you described was a deteriorating problem. Such types could only be caused by:

  • loose connection or cold solder. This is easily corrected by re-soldering any dull, grayish or dried up solder joints;
  • heat related. refers to components that became faulty due to heat. Often these would be the filter capacitors and would easily be identified by their blistered looks, leak at their base or split plastic wrap. Of course most of the major semiconductors are also heat affected.
Incidentally, your described "pop" is significant. This tells us that the supply B+ of the audio circuitry has considerable delay turning on. This could pinpoint the power supply as the primary area to diagnose.

This then would require opening the unit for a look & 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.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Posted on Nov 24, 2008

  • Louie  Role
    Louie Role Nov 25, 2008

    As initially posted, get hold of a Service Manual. Without one checks would be made haphazardly and would not be conclusive.

    Immediate attention is need in the output of the PSU. A DVM or VOM would then be needed to compare with reference voltages in the schematic diagram.


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If you want the service manual please click here...

Good luck...

Posted on Nov 24, 2008

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As the unit has a high power voltage it is always advisable to get the main board reparing work  done by a proper professional technician.anyways to diagnose it you will  be required to refer a circuit diagram of the board and check all the points accordingly with a multi meter and replace the faulty componets with the help of soldering iron.also dry soldering the whole board is advisable along with it.  

Posted on Nov 24, 2008

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It is not easy to fix, this is a symptom of crashing power supplies, protection and power management systems gone out of control. It may not be worth repairing because it will cost more than the price of a new set, and there could also be several more ailments with the set.

regards

Posted on Nov 24, 2008

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Problem in your Pioneer Pro-710HD seems dry solder joints in main board.
You need Pioneer Pro-710HD service manual and solder tools to carry out repair.
If you have basic electronics knowledge and also have some TV repair experience then you can do it yourself. If you don't have above said, I would recommend to call Pioneer Service for proper fix.
Thank you.




Posted on Nov 24, 2008

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Have you checked the fuse ?

If not have a check over that .

Have you tried basic troubleshooting like hard reset .

Posted on Nov 24, 2008

  • SAM ANDERSON Nov 24, 2008

    Have a look at the back and the board that is in the middle of the unit where the power cable wire connects has two fuses which are
    completely white and three regular looking fuses that were all intact
    and normal.Have a check over this fuse .
    Also have a check over source fuses .

    Regarding hard reset - Unplug your unit for about 30 minutes from power chord and plug back the power chord to the tv . This will reset your tv . If the problem is due to power supply issue it will be solved .


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Yes.the capacitors on the main board were getting short .that was the sound you were hearing .and now that capacitors r completely blown off.so needs replacement.and also check out the fuse on the main board.that also would have blown off in such cases.it just needs replacement.

Posted on Nov 24, 2008

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The capacitors on the main board are shorted, that is the most common problem by far, the bad news is that if your not a very skilled electronics technician deon't even attempt to fix it yourself, the soldering skill required alone is not for an amateur, If you have it repaired the bill will be $600+ because they will want to replace the main board, why not just buy one of the new LCD"s (42" are less than $900) and save yourself the headache of having it repaired and then having it fail again in a year or so?

Posted on Nov 24, 2008

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