I have bought a not complete and defective Dell Latitude 5520 for parts (needed the networkconnector (RJ45) to repair a other board).
Have repaired the other board (Dell Latitude 5540) and I wanted to know if I could find out what is wrong with the 5520 board (SouthPeak15 TGL MB 8L 19819-1) and perhaps repair this one also.
After connecting the USB-C charger (both USB-C ports on the laptop, does not have an other option) and pressing the power button, nothing happens (no lights or fans, no capslock).
Have checked with a thermal camera, and there are a couple of things...
diamon
Senior Member
Last Activity: Today, 12:08 PM
Joined: 02-26-2010
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It looks like that there is a hole in the chip next to U37 -
Have you used the dell diagnostic tool already (F12 at startup and choose diagnostic)....Leave a comment:
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Did some more research and took the gamble when I found a very similar motherboard.
The dell precision 3561 motherboard has the correct RJ45 network connector, removed the "new" connector and placed it on the 5530 board.
Board is fixed
...
Leave a comment:
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Thanks for the information. I have send an email to there regular email address (marketing(AT)singatron.com.tw) and not to Jennifer Kan directly.
If there not someone who has a defective motherboard (or these connectors) available, I will order a board from outside the EU....Leave a comment:
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Very good eyes, I have attached a clear picture of the logo.
Have found the manufacture, but unfortunately did not find this connector there [url]https://www.singatron.com.tw/en/product-c61920/RJ45-Half-Type-Connectors.htm[/url]https://Very good eyes, I have attac...tors.htm[/url]...Leave a comment:
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Looking for Dell Latitude 5520 / 5530 / 5540 RJ45 network connector replacement
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 [url]https://www.ebay.com/itm/256052956663[/url]
Dell Latitude 5530 [url]https://www.ebay.com/itm/125844181534[/url]... -
Thanks!!, the laptop works again, many thanks....Leave a comment:
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Sorry.
The full number of the board is:
DDM80 LA-F421P
Rev:1.0(A00)
Service tag: 6P4ZHR2Leave a comment:
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Dell Latitude 5590 (LA-F412P) bios repair please
I have here a Dell Latitude 5590 (LA-F412P), that does not start anymore and also the recovery procedure cannot start.
When I turn on the laptop, it provides me the following error code: 3 orange and 6 white.
According to the Dell site, this means "[url=https://www.dell.com/support/manuals/en-us/latitude-15-5590-laptop/latitude_5590_om/system-diagnostic-lights?guid=guid-9becc6af-055a-41e7-b43f-213d93101de8&lang=en-us]3,6 System BIOS Flash incomplete"[/url].
I have downloaded Latitude_5X90_1.32.0.exe and renamed it to BIOS_IMG.rcv, and have tested this BIOS_IMG.rcv... -
You can first start / try a bios recovery procedure. Remove external power adapter, press and hold CTRL + ALT on the keyboard of the laptop and then attach the power supply (still pressing those keys). When you see the dell logo, release the pressed keys. Before you start the above, download the biosfile.exe for your laptop and place this on a FAT32 USB stick.
Please let me know if this worked for your laptop...Leave a comment:
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Measurement of the mosfets.
PQ9 ZB0803 [url=https://web.excelliancemos.com/datasheet/MOS/EMZB08P03V.pdf]pdf[/url]
Source-Gate no measurement
Source-Drain resistance 1860K and goes higher it seems, my multi meter cannot show that.
Gate-Drain no measurement
PQ4 7409 [url=https://aosmd.com/res/data_sheets/AON7409.pdf]pdf[/url]
Source-Gate no measurement
Source-Drain no measurement
Gate-Drain no measurement
I have done the same measurements, but then on the PCB and the place of those mosfets
PQ9
Source-Gate...Leave a comment:
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I have searched on the board for a TI / BQ chip, did not find it. I have the schematic of a Dell 5580 board [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/105952-dell-latitude-5580-compal-cdp80-la-e151p-r0-2-schematic"]la-e151p[/URL]. Those 5580 board are visual very identical as the 5590 boards.
PQ9
Source-Gate 1001K
Source-Drain 177K
Gate-Drain 1174K
PQ4
Source-Gate 496K
Source-Drain 103K...Leave a comment:
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Dell 5590 LA-F412P does charge with USB-C not with DC-Jack
As mentioned, I have a Dell 5590 laptop with motherboard LA-F412P.
This laptop works with the USB-C charger and not with DC-Jack charger.
With the USB-C charger attached, the battery is charging and in the BIOS the charger is also recognized.
With the DC-Jack charger attached (USB-C charger removed), the light of the charger is not going off and the BIOS does not see the charger (message AC Adapter = Not installed). I'm using original Dell chargers and I have tested the used chargers on other Dell laptops and they are working correctly.
I have replaced the DC-Jack,... -
Re: Issues with new Surface Pro 5 screens
First of all, sorry for no reaction from my part (some medical issues).
Does someone has a schematic of this connector regarding the i2C and the power lines ?Leave a comment:
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Re: Issues with TPM ic in laptops
I had this issue, and after replacing the TPM chip (Dell 5580 and replaced the chip from a donor board
, also a 5580 board) everything worked again.Leave a comment:
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Re: TPM not detected on dell laptops
I had this issue with a Dell 5580 device. Tried a lot of things, but nothing solved the problem.
The last thing solved the problem, I replaced the tpm chip from a donor 5580 motherboard. Not sure if a other tpm chip will work without the correct firmware on it and perhaps it must be also the same chip number.Leave a comment:
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Re: Issues with new Surface Pro 5 screens
Nobody who has an idea what the cause could be ?Leave a comment:
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Issues with new Surface Pro 5 screens
I have three Microsoft Surface Pro 5 model 1796, with all cracked screens.
Have bought from Aliexpress three new screens, the part numbers from my and the seller are the same:
Bad working China screen part number:
Good working own screen part number
Error I get with the bad working China screen:
No error with the good working own screen:
All the three China screens (all the same exact part numbers) produce the same error in Device manager. Have also performed a clean installation... -
Re: HP Elitebook 850 G3 Power-On password
I have also uploaded the content of the other chip W25Q64FVIQ.
Perhaps this file needs to be changed to ?...Leave a comment:
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