Question about BenQ FP731 17" LCD Monitor

2 Answers

I have one thats dead and

After i resoldered everything it flashes on and off and no display and other iedas? Can i get another power supply board for this thing
thanks
Robert

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  • robd04 May 11, 2008

    Fixed it,



    I recapped the board where the heat sinks and are it works perfect again!



    Robert

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On my FP737s-D the circut board had the part no DS1107A.
Q759 had a black mark on the top of the pcb. Some plastic had 'blown' out of the trannie. Underneath the solder was dry jointed - ie melted. Replaced 759, 760.
Symptom. No screen picture, but a faint squeal noise

Posted on May 11, 2008

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Robert,
What happens exactly?
Does power LED flash on/off or the displat comes on and goes off?Do you get Benq screen when you power on with front power switch?
T751,752,753,753 are the transformers to be resoldered ,and resolder Transistors Q759,60,39,40,43,51.
Please check them with a multimeter if you are adept .
Please rate the solution and provide feedback.
Samir

Posted on May 03, 2008

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My pioneer pro-710 hd 64 in. is starting to shut down (picture and sound goes away,but still is on


Your Pioneer 710HD has the classic cold solder joint problem endemic to all of this series of Elite CRT RPTV. The power supply - PS - board needs to be resoldered virtually completely. It's a time consuming, tedious job that if you get wrong, who knows what could happen when you turn it on again? So don't even think about resoldering it if you are an amateur at the soldering process.
I do this job every day then run it out in my test 610HD - same series - and then equip your board with a lifetime warranty on the resoldering work I have done. Please contact me directly, google Mr Bob and calibrations and Image Perfection. Unless you do resoldering every day as a professional assembler or are an experienced repair tech, I cannot in good conscience advise you to do this yourself. Far too much is riding on it.
However, if you are highly experienced at soldering, resolder everything but the heat sinks, the test points, and whatever has already been resoldered and is still glossy and gleaming, like fresh resoldering is. The solder used in the original assembly of that board was far too thin, which results in these cold solder joints.
And don't do it part way! Many joints that are not bad now will be soon, trust me, and if you have only resoldered just the ones that are bad now - the early ones to go out - and continue to use it, you make your board that much more susceptible to the far more dangerous ones that happen later on, which can damage boards downline from the power supply board.
I am the only repair person I know of offering a lifetime warranty. Even Pioneer does not do that. In fact I have permanently corrected many rebuilt Pioneer boards when they've gone out later. Pix are available at www.avsforum.com
In your case chances are you have not heeded the warning signs of cold solder joints: intermittent ops, blue flashes, fluctuations in the brightness of your pic and other instabilities.
In the case where one of these units turns on then turns off again - LED in front goes green, then immediately back to red before a picture has a chance to appear - it's "going into protection". Chances are something downline has now been damaged because of the instability of the PS board, which is responsible for powering up the entire unit.
What I would recommend if it's "gone too far" and the unit will not stay on anymore, is a troubleshooting session with me on the phone, which is something I require before allowing a PS board to be sent to me for resoldering if the set's not staying on. Luckily, these sets were designed with on board diagnostics that can be read by technicians from far away.

If it goes green then stays green but no pic appears - even graphics like the Menu - then one of the cold solder joints that powers up the section that powers up your picture has opened up and is now staying open. This has always been remedied 100% by the resoldering process.
If it powers up correctly upon turnon from dead cold, DON'T PUSH IT! If it still has intemittencies, it's in a very precarious, dangerous condition. Many sets have been run past their warning signs, and by the time I get notified and can lend a hand, they are considered totalled and are abandoned. Don't let that happen to you. RUN IT FOR NO MORE THAN 40 SECONDS, and power it down again and unplug it. DO NOT ALLOW IT UP TO NORMAL OPERATING TEMP AGAIN - EVEN ONCE - UNTIL FIXED PROPERLY.
If it turns on from dead cold and works properly even tho intermittencies have happened in the past, this is the best case scenario. It means it can be resoldered properly and you'll be home free. Or sent to me for resoldering if you are not a highly experienced repair tech or assembler, in which case you'll get my lifetime warranty on the resoldering work..

Mr Bob510-278-4247bob@imageperfection.com

Jan 23, 2012 | Pioneer PRO-710HD 64" Rear Projection...

1 Answer

I have a pioneer 710HD elite that is stuck in standby mode. The red power light is on, but it will not come out of standby to turn on with the green light on. Thoughts?


Your Pioneer 710HD has the classic cold solder joint problem endemic
to all of this series of Elite CRT RPTV. The power supply - PS -
board needs to be resoldered virtually completely. It's a time
consuming, tedious job that if you get wrong, who knows what could
happen when you turn it on again? So don't even think about
resoldering it if you are an amateur at the soldering process.
I do this job every day then run it out in my test 610HD - same
series - and then equip your board with a lifetime warranty on the
resoldering work I have done. Please contact me directly, google Mr
Bob and calibrations and Image Perfection. Unless you do resoldering
every day as a professional assembler or are an experienced repair
tech, I cannot in good conscience advise you to do this yourself.
Far too much is riding on it.
However, if you are highly experienced at soldering, resolder
everything but the heat sinks, the test points, and whatever has
already been resoldered and is still glossy and gleaming, like fresh
resoldering is. The solder used in the original assembly of that
board was far too thin, which results in these cold solder joints.
And don't do it part way! Many joints that are not bad now will be
soon, trust me, and if you have only resoldered just the ones that
are bad now - the early ones to go out - and continue to use it, you
make your board that much more susceptible to the far more dangerous
ones that happen later on, which can damage boards downline from the
power supply board.
I am the only repair person I know of offering a lifetime warranty.
Even Pioneer does not do that. In fact I have permanently corrected
many rebuilt Pioneer boards when they've gone out later. Pix are
available at www.avsforum.com
In your case chances are you have not heeded the warning signs of
cold solder joints: intermittent ops, blue flashes, fluctuations in
the brightness of your pic and other instabilities.
In the case where one of these units turns on then turns off again -
LED in front goes green, then immediately back to red before a
picture has a chance to appear - it's "going into protection".
Chances are something downline has now been damaged because of the
instability of the PS board, which is responsible for powering up the
entire unit.
What I would recommend if it's "gone too far" and the unit will not
stay on anymore, is a troubleshooting session with me on the phone,
which is something I require before allowing a PS board to be sent to
me for resoldering if the set's not staying on. Luckily, these sets
were designed with on board diagnostics that can be read by
technicians from far away.
If it goes green then stays green but no pic appears - even graphics
like the Menu - then one of the cold solder joints that powers up the
section that powers up your picture has opened up and is now staying
open. This has always been remedied 100% by the resoldering process.
If it powers up correctly upon turnon from dead cold, DON'T PUSH IT!
If it still has intemittencies, it's in a very precarious, dangerous
condition. Many sets have been run past their warning signs, and by
the time I get notified and can lend a hand, they are considered
totalled and are abandoned. Don't let that happen to you. RUN IT
FOR NO MORE THAN 40 SECONDS, and power it down again and unplug it.
DO NOT ALLOW IT UP TO NORMAL OPERATING TEMP AGAIN - EVEN ONCE - UNTIL
FIXED PROPERLY.
If it turns on from dead cold and works properly even tho
intermittencies have happened in the past, this is the best case
scenario. It means it can be resoldered properly and you'll be home
free. Or sent to me for resoldering if you are not a highly
experienced repair tech or assembler, in which case you'll get my
lifetime warranty on the resoldering work.

Mr Bob510-278-4247bob@imageperfection.com

Dec 18, 2011 | Pioneer PRO-710HD 64" Rear Projection...

1 Answer

My pioneer pdp 5030hd display stopped working and the green LED flashes continuously! Help!


The tv power supply board is the problems and the causes,it dead.That the board,where the power a/c cord plug into it.Try website like Ebay.com to buy whole refurbish power supply board for the replacement.

Dec 12, 2010 | Pioneer PureVision PDP-5030HD 50 in....

2 Answers

Tv light flashed and cut off . turned back on and green light turned red and blinked 6 times pause then 6 blinks etc... tv will not power on. checked lamp seems to be ok. checked power supply board and...


Hello,

Your power supply board is not yet dead, u know basic electronics' and soldering? You have to open the back cover of the television check for dry soldering on the printed circuit board , if found resolder but if not Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

I hope this will help in solving the problem...

Nov 29, 2010 | Televison & Video

1 Answer

Flashing power indicator and no picture, reboot and works fine, for awhile


Hello,
you have to open the back cover of the televiion to check for dry soldering, bulged capacitors, if fond resolder and replace bulged capacitors respectively, if otherwise Power supply board not yet die.It can be dead at anytimes.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Hope this helps....

Jul 08, 2010 | Samsung HP-P3761 37 in. HD-Ready Plasma...

1 Answer

Power light is flashing green. i hold the power button it turns red. i press it again it turns yellowish then solid gree the screen comes on the 3 second later screen goes blank and flashing green power


Sharp tv are famous for this problems.Take ur tv aparts,where the a/c power cord go into it.That ur tv power supply board,check for all those dead leakage capacitors parts that bulges up on it top or puff up on it top.Than it ur power supply board,replaced those dead leakages capicitors or replaced the whole power supply board.No leakage capcitors on the power supply board.Than it 100% the Tuner board it dead,this board is where the coalax broacast tv signal cable go into it.This board can't not be repair only replaced,because it alway some ICS it the problems it dead on this Tuner board.Tries websties like Shopjimmy.com,Ebay.com to buy either or both refurbishes the power supply board or the Tuner board.

May 26, 2010 | Sharp LC32D47UT 32 in TV

2 Answers

My Akia 27" lcd tv wont come on, all I am getting is a flashing red light and a popping sound. What could be wrong with it?


Ur power supply board is dead.Tries Websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

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3 Answers

Sanyo DP52449, tv getting power but no display


When DP52449 (chassis 01 - that is important!) does not power on and the front LED flashes every 15-20 seconds you have a faulty main board, which you need to replace or get serviced.

We presently do not offer replacement boards, but we do offer repair services for them at
http://www.coppelltvrepair.com/p/59/sanyo-dp52449-p52449-01-main-board-n7ke-repair-service


You may also be curious to read the article we wrote back in July 2012 on a problem that sounds exactly like yours and which lead to the service offerring:
http://blog.coppelltvrepair.com/2012/07/sanyo-dp47460-dp42840-dp46819-and.html

Hope this helps!

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1 Answer

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Feb 17, 2010 | Sony Bravia KDL-42V4100 42 in. LCD TV

2 Answers

Pro-710hd


This has been successfully answered, but here's some more information:
Your Pioneer 710HD has the classic cold solder joint problem endemic to all of this series of Elite CRT RPTV. The power supply - PS - board needs to be resoldered virtually completely. It's a time consuming, tedious job that if you get wrong, who knows what could happen when you turn it on again? So don't even think about resoldering it if you are an amateur at the soldering process.
I do this job every day then run it out in my test 610HD - same series - and then equip your board with a lifetime warranty on the resoldering work I have done. Please contact me directly, google Mr Bob and calibrations and Image Perfection.
Unless you do resoldering every day as a professional assembler or are an experienced repair tech, I cannot in good conscience advise you to do this yourself. Far too much is riding on it.
However, if you are highly experienced at soldering, resolder everything but the heat sinks, the test points, and whatever has already been resoldered and is still glossy and gleaming, like fresh resoldering is. The solder used in the original assembly of that board was far too thin, which results in these cold solder joints.
And don't do it part way! Many joints that are not bad now will be soon, trust me, and if you have only resoldered just the ones that are bad now - the early ones to go out - and continue to use it, you make your board that much more susceptible to the far more dangerous ones that happen later on, which can damage boards downline from the power supply board.
I am the only repair person I know of offering a lifetime warranty. Even Pioneer does not do that. In fact I have permanently corrected many rebuilt Pioneer boards when they've gone out later. Pix are available at www.avsforum.com.
In your case chances are you have not heeded the warning signs of cold solder joints: intermittent ops, blue flashes, fluctuations in the brightness of your pic and other instabilities.
In the case where one of these units turns on then turns off again - LED in front goes green, then immediately back to red before a picture has a chance to appear - it's "going into protection". Chances are something downline has now been damaged because of the instability of the PS board, which is responsible for powering up the entire unit.
What I would recommend if it's "gone too far" and the unit will not stay on anymore, is a troubleshooting session with me on the phone, which is something I require before allowing a PS board to be sent to me for resoldering if the set's not staying on. Luckily, these sets were designed with on board diagnostics that can be read by technicians from far away.
If it goes green then stays green but no pic appears - even graphics like the Menu - then one of the cold solder joints that powers up the section that powers up your picture has opened up and is now staying open. This has always been remedied 100% by the resoldering process.
If it powers up correctly upon turnon from dead cold, DON'T PUSH IT! If it still has intemittencies, it's in a very precarious, dangerous condition. Many sets have been run past their warning signs, and by the time I get notified and can lend a hand, they are considered totalled and are abandoned. Don't let that happen to you. RUN IT FOR NO MORE THAN 40 SECONDS, and power it down again and unplug it.
DO NOT ALLOW IT UP TO NORMAL OPERATING TEMP AGAIN - EVEN ONCE - UNTIL FIXED PROPERLY.
If it turns on from dead cold and works properly even tho intermittencies have happened in the past, this is the best case scenario. It means it can be resoldered properly and you'll be home free. Or sent to me for resoldering if you are not a highly experienced repair tech or assembler, in which case you'll get my lifetime warranty on the resoldering work..
Mr Bob510-278-4247bob@imageperfection.com

Apr 28, 2008 | Pioneer PRO-710HD 64" Rear Projection...

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