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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.
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Re: DELL 2405fpw
You sure have good memory retiredcaps.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: DELL 2405fpw
I can't even remember what I had for lunch today. If I didn't document the almost burnt bacon and eggs, I would have forgotten.
Now is Mirage00 willing to take apart a good working monitor to save the other one?
@budm, any chance the USB board is generating any voltages that are needed by the main board like the Dell 2007fpw that you did an analysis on? The two good voltage regulators have to be getting their 3.3V from somewhere?--- 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.
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Re: DELL 2405fpw
I am not sure (you mean the 2407), I really expect to see a transistor close by the power pin of the T-CON connector. See example of the Dell 2007. The 5V for the T-CON must be coming from 5V buck regulator some where since this monitor has only 19V power supply (I believe).Last edited by budm; 06-28-2012, 11:08 PM.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: DELL 2405fpw
Sorry, I meant your analysis of this monitor
https://www.badcaps.net/forum/showthread.php?t=20531--- 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: DELL 2405fpw
Oh that one too.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: DELL 2405fpw
Hi Please can you test that orange pico fuse.
Also can you mark on the picture with the red squares ,the part nos so we know which is which.
Perhaps a close up well lit picture of the top corner marked out by budm and the back of that area would help.
Unless I have missed it there has been no comment on the result of your tests on the mosfets.
In the eservice post you mention it does say
"The IFR5305S drain should be at 5VDC. I measured this from a properly working monitor. This means a 3V Zener is incorrect. Use at least a 6.8V Zener which should be quite safe for downstream parts. I managed to supply 5V to the drain (after removing the burnt FET) from an external 5V SMPS and all works well."
Whereas I think you are saying you have 0.00 on the drain?
If the 5305S is not in the area for which the close up was requested can you do it as well.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: DELL 2405fpw
I will get the info later today! I'm glad this thread is still alive, I was getting nervous.
Once again, I must thank everyone for their time and contributions. It still amazes me that I have people who are willing to take time and help me out for no other reason than they want to.
"Oh, uh, there won't be any money, but when you die, on your deathbed, you will receive total consciousness"Comment
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Re: DELL 2405fpw
That PICO is the fuse after the DC output of the main 19V power supply that supply the power to all the boards, the voltage get stepped down to lower voltage by a bunch of regulators. If that fus eis blown, the whole unit will be dead, it uses about the same aset up as the 24xx sereis monitor, single output main power supply.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: DELL 2405fpw
So nothing left to do from @selldoor's post?
Comment
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Re: DELL 2405fpw
These need to be verify:
"Hi Please can you test that orange pico fuse."
"Unless I have missed it there has been no comment on the result of your tests on the mosfets.
In the eservice post you mention it does say
"The IFR5305S drain should be at 5VDC. I measured this from a properly working monitor. This means a 3V Zener is incorrect. Use at least a 6.8V Zener which should be quite safe for downstream parts. I managed to supply 5V to the drain (after removing the burnt FET) from an external 5V SMPS and all works well."
Whereas I think you are saying you have 0.00 on the drain?
If the 5305S is not in the area for which the close up was requested can you do it as well."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: DELL 2405fpw
The reading for the IFR5305S drain pin is 0.00V. If it is supposed to be 5V, then it is easy to verify.
I know if I had 2 identical monitors, I would have already done the voltage comparisons between the good and bad to know if the drain pin should be 0.00 or 5V.--- 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: DELL 2405fpw
That can be the switched MOSFET that feed the 5V B+ to the T-CON board.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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Last edited by retiredcaps; 06-29-2012, 06:45 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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Re: DELL 2405fpw
In the other URL, it mentions D19 as being the diode that is shorted out.
Power off, unplug the lcd and test your D19 with the diode test function on your multimeter. You should have 2 readings. Report both.--- 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.
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Re: DELL 2405fpw
Test it how? Sorry, not an expert........yet
Comment
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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.
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Re: DELL 2405fpw
Okay did the test and both readings were 0Comment
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My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?
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Thank you for your c...01-29-2024, 04:12 AM -
Hello all,
this is my first post, so if I make mistakes please do not hesitate to point them out, thank you in advance.
I got a Dell Latitude 5420 (Service Tag: 7RFM6D3, Motherboard: GDF40 LA-491P Rev.: 2.0 (A01)) which does not start and I want to repair it. These are the symptoms:
If the laptop is only connected to the AC adapter (battery removed):
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I have a Dell Latitude 5530 with a damaged RJ45 network connector. See the attached pictures.
Have already searched on Farnell / Aliexpress / Ebay and had contact with several suppliers on Aliexpress and Ebay, but they cannot deliver this connector.
Is there someone inside the EU, who has these connector(s) or perhaps defective motherboard(s) for these laptop models I have mentioned in the topic title.
Pictures of these boards:
Dell Latitude 5520 https://www.ebay.com/itm/256052956663
Dell Latitude 5530 https://www.ebay.com/itm/125844181534
Dell...
Comment