I just recently replaced 3 capacitors on the power supply board on my Dell 1905FP and it seemed to be working okay, being a neebie I read that all capacitors should be replaced just to be safe. So I changed out all the caps and now it will not turn on at all. I have checked all caps to make sure they have correct polarity. Can anybody give me a list or picture of all the cap values and locations so I can make sure I haven't mixed anything up. Thanks
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Re: Dell 1905FP Capaitor Layout
1) Double check all your internal connections.
2) Does the power LED come on?
3) If you have a multimeter, check to see if the secondary DC voltages are present between the power board and logic board. At least one of them should be 5V DC.--- 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: Dell 1905FP Capaitor Layout
https://www.badcaps.net/forum/showthread.php?t=13063
https://www.badcaps.net/forum/showthread.php?t=11807
Search function is your friend
veritas odium paritComment
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Re: Dell 1905FP Capaitor Layout
I have looked through the forum and still not found a layout. Could anyone provide a list of each capacitor location and value. i.e.: c102 22uf . thanksComment
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Re: Dell 1905FP Capaitor Layout
3 caps on the +5volts are 1000uf @ 16v and there is a 4.7uf on the +5 volts supply too
4 caps on the +24volts are 470uf @ 35v
1 cap that feed the +12 external power jack is 1000uf @ 25v
the two caps near the inverter transformers are 220uf @ 50v
hope this help
ecking767Last edited by ecking767; 09-29-2011, 07:37 PM.Comment
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Re: Dell 1905FP Capaitor Layout
Make a cap map next time please.Attached Filesveritas odium paritComment
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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?
Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?
My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
I have tried multiple different Dell power adapters. My Dell... -
I would like to share my experience about charging issues with Dell power supplies with the tech community. I am working on a Dell Inspiron 5590, Mainboard 18778-1 with charging problems. The device can be switched on and works so far, only the message appears at startup:
Alert! The AC power adapter wattage and Type cannot be determined. The battery may not change. The System will adjust the performace to match the power available.
The power supply unit is not recognized in the Bios and the charging process is set to "idle". I use original Dell battery, type... -
Hello,
My Dell Precision 5530 turned off suddenly when I was running Matlab and wouldn't turn on, show any lights, fans, and/or any signs of activity at all. I opened the case, removed the battery and looked at the board with a thermal camera while the AC adapter was connected. I saw that PU1252 was >120C so figured the chip had died on me Got the part number off the attached schematic (see Mouser link below) and replaced the chip. After replacing the chip the board (connected to AC adapter) was able to briefly power on, spin the fans a little bit, and turn on the front led lights.... -
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):
When I press the power button, the keyboard backlight and the display backlight are turning on. Caps key light is lightning, but key does not respond to pressing it.
The power/battery... -
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...
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