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Fluxi_77

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Last Activity: 03-12-2025, 07:56 AM

Joined: 01-18-2025

Location: Terento, Bolzano

Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-28-2025, 04:20 AM
Yeah thank you
From here: [URL]https://it.aliexpress.com/item/1005007661898327.html?spm=a2g0o.detail.0.0.4ba1vNZMvNZMfi&productId=1005007661898327&pdp_ext_f=%7B%22tabScene%22%3A%22retail%22%2C%22sku_id%22%3A12000041698640524%2C%22origProductId%22%3A%221005007661898327%22%7D&gatewayAdapt=glo2ita#nav-specification[/URL]
The H one looks pretty similar from the pin perspective but I dont have exact measurements so its difficult to say if it will fit...https://Yeah thank you :) <br /> Fro...fication[/URL]...

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-27-2025, 08:36 AM
Yes there is written DEREN 15154AC.
I also found this list on the DEREN website [url]https://manage.deren.com:899/static/lib/ueditor/1.4.3/net/upload/file/20221020/6380187615780453804990222.pdf[/url] and it should be either the 1 or 4 one here with LED depending on the exact measurements...
But where could I find this exact part then?https://Yes there is written DEREN 1... or 4 one here

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-27-2025, 08:07 AM
I am just a hobbyist so this is basically one of the first repairs I did so I don't have a common supplier of parts. And I am also not in a rush so aliexpress would be fine if I would pay less than the 30€ I would for the donor board. Down are the other two sides of the port. Maybe it helps finding it.

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-27-2025, 07:18 AM
Also the ethernet port is still not but there I think it is a mechanical port problem because I get the 3.3V on the port and when I press the cable hard into the board and wiggle a bit I see the orange LED blinking for a few seconds and when I let go it stops blinking. There I also have difficulties to find a replacement because this one has 12 pins 8 for the standard ethernet things and other 2 on each side for the LEDs I believe. So I am not sure where to find one. Or if I should just buy a faulty donorboard on ebay for 30€ where I can take the ethernet port and also the k6w 33 tvs diode.....

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-27-2025, 06:58 AM
Thanks a lot It is black so should be 2.0 so both of these should work?
And what is the best way to buy them because mouser.com and these websites charge like 20€ for delivery if I don't spend more than 50€ while the part itself only costs a few cents....

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-25-2025, 09:02 AM
I looked at my only other HP motherboard I have but I did no find any component exactly matching this one and in the internet I also don't find anything when I type k6W 33 so I dont know what to replace it with...

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-25-2025, 08:29 AM
I removed D2400 and the short is gone... I did not want to try to turn the laptop on because I did not know what type of component that is and if it is needed.

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-25-2025, 07:59 AM
It was this guy... Can anyone tell me what this is and what I can replace this with?

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-25-2025, 06:09 AM
I measured around there but I can't find a short in that region.......

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-25-2025, 04:10 AM
Hi, I removed this cap but the short still appears... Do you think voltage injection would be useful here to find the faulty item or is it too risky? If not how much voltage and amps would be safe?...

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 09:00 AM
Yeah the pins look fine... How do these bulk capacitors look and how can I measure the F value. As I said I am a newbie so sorry for that

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 08:26 AM
Removed both but Vout still shorted. You meant these ones right?

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 07:56 AM
Short is still present on all three Vout pads

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 06:51 AM
I measured a connection to ground on all three Vout pins.

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 06:47 AM
Okay thanks how can I check if it is faulty?

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 06:21 AM
With these four images and the two from before you should have the whole board. Sorry it is difficult for me to take good photos because I don't know what to look for.

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 05:57 AM
This is front and back... Hope you can read something.. If you want a more detailed image of a specific chip I can use the microscope to make a photo.

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 05:13 AM
Should I remove both of them behind each connector or just one and test that connector?

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-20-2025, 03:57 AM
I have now done the test and both pins 1 which are displayed in the image have a continuous path to ground which is probably not good... The Pin 1 of the ethernet port on the other hand is not connected to ground.
Where could I continue?

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Fluxi_77 replied to HP 355 G2 Left USB Ports and Ethernet Port not working

in Troubleshooting Laptops, Tablets, and Mobile Devices

02-19-2025, 12:48 PM
No the port which is connected with the ribbon cable is at the right side and this port works fine. But I could do the multimeter check tomorrow if that helps narrowing down the problem.
Thanks in the meantime for answering ...

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