Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
Seems little improved, but it still does turns off whenever there us a black scene. Somehow if I can maintain that low voltage....
sacrh
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Last Activity: 09-02-2020, 08:50 PM
Joined: 08-30-2017
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
After long I started having the problem (since few months now). But has been more prominent now. Basically whenever the background picture gets dark in the movie or news (night scene etc...), voltage starts dropping & TV turns off. Seems it can not maintain lower voltage requirements of the TV set. Is this the problem with the power supply board? As that's the only board I never replaced? Or is it LED backlight issue?
Appreciate your responses.Leave a comment:
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
Budm sir my apologies. I have been working in the office & then busy helping volunteering cleaning work for Hurricane victims around neighborhood since last few weeks. I did spent some time going thru the schematics diagram but was not able to lot time reading material. I did my basic electronics during engineering so very well aware of the diodes capacitors, transistors. Will check few more things for Transistors as it has been a long time.
Really appreciate...Leave a comment:
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
Any thoughts. Which one is thepanel board?Leave a comment:
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
I turned down the backlights level (from middle to low) & now the TV turns off within 10-15 seconds .. I do not even get chance to revert that settings. By the time I can reach the picture setting the TV is turned off.Leave a comment:
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
By 'Flow of voltage', I was referring to functional flow, once Power Switch is turned ON, & then from standby mode untill there is a picture on the screen. Possible voltages on various connector pins & IC's during this process. Like when TV is in standby & then in power ON mode. Basically which pin I should get how much voltage at what point of time (mainly I was curious about pins on connector 6150 on power board) & different pins on IC's on Main board. Also...Leave a comment:
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
Was curious if there is any document/picture shows the flow of voltage. Meanwhile I changed the Power board & Main board & almost able to had everything working. Sony logo comes up with the sound. Was able to upgrade the firmware, set the network configuration & tune & watch the channels. The problme I am running into now is, after around 10-15 mins watching, the TV turns off & then gives "6" blinks of the Red standby light.
The diagnostic...Leave a comment:
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
My apologies for the delayed response.
Yes very well aware of the schematics & have all the gears at home. DMM, Soldering kit, etc..
I have attached pictures of the back of the TV, Power board & Main/Logic board (replaced this day back so not original). Also atached some schemtics diagram from the manual.
Thanks...Leave a comment:
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Re: SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green lig
After doing some more diagnosis felt the Power board seems to be the issue somwehere. As the green light turns on I will be curious to know how the voltages flow. Where can I verify the voltages flow between different boards. Specifically triggering of high voltages on Power board from logic board. Went thru dufferent manuals but will appreciate any inputs or do we have any thread running on that?Leave a comment:
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Re: LCD TV and Monitor basic troubleshooting guides
Needed scahematics diagram for all circuit boards for: TV SONY KDL-52ex700Leave a comment:
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SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green light
SONY KDL-52ex700: No picture, No sound, No backlight but gets Standby & Green light
We came one evening & realized this problem when tried to turn on the TV (SONY KDL-52ex700), there has been, no sound, no picture, no click sound (for backlight).
Here is the sequence I have checked so far.
1. Pressing the Energy saving switch button, TV used to turn ON green light, get backlight click sound & used to show Sony logo with sound
- None above happen anymore. No green light, No sound, no picture, No backlight
2. Pressing the power switch button... -
Re: New Members - please post your introductions here
Desperately looking for help to fix my Sony TV where I lost many other instruments after power surge. Found this site as great source of information & seems gathering of extremely helpful & intellectual gentlemen's. Hoping to get my problem solved & but already learned so much after reading thru posts. looking forward to enjoy different technology.Leave a comment:
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