42PFL3704D/F7 No picture
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Re: 42PFL3704D/F7 No picture
I have a philips 42pfl3704d/a7 with no picture, Iknow it has something to do with the inverters. I have checked the voltage at the cn1804 and cn1803 connector and got 50v, isn't that to high(should be +24v )? the screen flashes when you turn on the tv everything else seems to work sound, channel changer and you can see the pic. with a flashlight.Comment
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Re: 42PFL3704D/F7 No picture
I suspect you may be using the wrong ground for your measurements. If you are really getting 50V DC, a lot of capacitors should have blown tops.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
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Re: 42PFL3704D/F7 No picture
Might also have your multimeter on AC, instead of DC voltage. Im too lazy to consider whether that makes voltages seem higher or lower then normal.Fixed so far 12 lcd's , 1 plasmas, 5 monitors, 0 dlp's (plan to keep the dlps at 0). and 3 atx power supplies, and 2 motherboards.Comment
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Re: 42PFL3704D/F7 No picture
Ok now I got 24v was using ac instead of dc setting, I was using the hot ground of the tv, now I suspect the invertor board to be the problem, tried resoldering all the connections on the board no help.Comment
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Re: 42PFL3704D/F7 No picture
The standard procedure here is to provide clear focused top down view pictures of all your boards following the instructions in my sig file below exactly.
Afterwards, we can suggest other test points.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
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Re: 42PFL3704D/F7 No picture
Can we get CLEAR closed up pictures of the inverter board where the connectors (white connectors with red/black wires) are?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: 42PFL3704D/F7 No picture
Thanks to all who have posted help on this thread thus far. I t gave me a place to start looking for my offending components. We have a nice bright white screen, sound and can move through the channels. Tried all inputs, and the output is the same. Just a bright white screen.
I know HOW to use a multimeter, just not sure exactly where to test inside the tv.Comment
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--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
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Re: 42PFL3704D/F7 No picture
@dadsfishin, so you do have backlights, you do see glowing screen, if you do, then you need to check the surface mounted fuse and voltages on the T-CON board, its the board that sits at the center top middle of the panel in the back. Post the pictures using attachment function.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: 42PFL3704D/F7 No picture
Thanks budm for posting the correct check.
Last edited by retiredcaps; 05-03-2012, 11:05 PM.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: 42PFL3704D/F7 No picture
@retiredcap, that what I thought you were thinking about, too much solder fume tonight?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: 42PFL3704D/F7 No picture
Missing, stars Ashley Judd, is like "24".--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
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Re: 42PFL3704D/F7 No picture
Oh, I love "24". I will check out 'Missing' to see if it is good.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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