Re: DELL 2405fpw
Yeah I ordered the Zener and Mosfet from digikey last week. Should be here this week. I will let you guys know what happens. I just realized didn't get a surface mount zener. Hopefully it wont be an issue soldering it?
-
Re: DELL 2405fpw
Looks like he replaced the badly damaged 5V power supply section with the new 5V supply board. If 6.8V Zener is not too low for the Gate drive, I do not see why not, if it works.
So you are going to replace the Zener and the MOSFET and see what happen?Leave a comment:
-
Re: DELL 2405fpw
Ok. BTW, I found this website and wound up ordering a 6.8v zenner. Apparently this guy had a similar problem with the video after he fixed the power supply issue. He measured the output of the drain on a working monitor and determined it should be 5v. Interesting how he fixed the issue. Let me know what you think.
http://www.cse.iitb.ac.in/soumen/Sys...2405fpwRepair/
and I also found this one.
http://forum.eserviceinfo.com/viewtopic.php?t=63329Leave a comment:
-
Re: DELL 2405fpw
The Zener shouLd be 12~15V, I would use 15V Zener 1/2Watt (the F5035S GATE is made to handle up to +/-20V), 15V should be OK.Leave a comment:
-
-
Re: DELL 2405fpw
Not being shorted is no guarantee that the mosfet is working properly. It still may be turning on properly.
If it were me, I would get the replacement diode in addition to the mosfet. It is $2.47 at digikey.
http://www.digikey.com/product-detai...FCT-ND/1769871Leave a comment:
-
Re: DELL 2405fpw
Ok all readings on the Q1 are 1 (yes left side of DMM)Leave a comment:
-
Re: DELL 2405fpw
You really should read my entire guide (section 2 on mosfets)
https://www.badcaps.net/forum/showpo...4&postcount=19Leave a comment:
-
-
Re: DELL 2405fpw
Its the component covered in black rubber. It's had sticker on it that read
19-40
229-011
LSELeave a comment:
-
Re: DELL 2405fpw
So I went back to that URL again, I can see now they were talking about circuits in the main board around the area I circled, if that the case, do you get short circuit on that Q1 (F5305S)? You already found out that D19 Zener is shorted out. If that Zener is for the Gate protection, I would expect it to be in 12~15V range.
So it looks like you are working at the right area.Last edited by budm; 06-29-2012, 08:50 PM.Leave a comment:
-
Re: DELL 2405fpw
On the bottom side of the board, there is one component that I circled, what is that part?Leave a comment:
-
Re: DELL 2405fpw
Logic board. Upper left by the Capacitors. In the area that was marked by a square in a prior post. It's to the left of the screw holding the rubber wire on the boardLeave a comment:
-
Leave a comment:
-
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.Leave a comment:
-
Re: DELL 2405fpw
The "fat tab" and pin 2 (center) are internally electrically connected.Last edited by retiredcaps; 06-29-2012, 06:45 PM.Leave a comment:
-
ALL LCD LED TV SERVICE MENU CODES
Service Menu Code with Board Name
China Universal Board / Jumper Board Service Menu Code
Changhong Ruba Service Menu Code
Ecostar LED TV Service Menu Code
Orient LED TV Service Menu Code
Haier LED TV Service Menu Code
TCL LED TV Service Menu Code
Samsung LED TV Service Menu Code
LG LED TV Service Menu Code
Videocon LED TV Service Menu Code
Supra LED TV Service Menu Code
Toshiba LED TV Service Menu Code
Symphony LED TV Service Menu Code
Veste/ LED TV Service Menu Code...10-31-2024, 03:58 AM -
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... -
Hello,
A few days ago my Dell 2408 has stopped to working without any noticeable sign.
It can be power on, power light stays green, backlight works but there is no OSD, menu input, Dell logo etc. It happens if there is some input source connected or not.
I disassembled the case but I didn't see any failures on the board. The only element that looked suspicious was L6561 - there was some brown dirt under it. So I replaced this IC but it changed nothing.
What else should I checked or is this repair even possible/worthwhile?
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):
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...
Leave a comment: