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by mohammad462
Tue Aug 28, 2018 3:09 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

I found that polyfuse. The voltage of both ends was 5 volts compared to GND. This means healthy polyfuse. Is there another suspicious part to be tested? Did you look at photo 2? Why does it get usb to power? Thank you for all the friends who help me. I am not English and I have to use a Google trans...
by mohammad462
Mon Aug 27, 2018 10:59 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

Yes
I found it.
I connected the negative USB pole to each of the polyfuse bases and the voltage was the same. :D
by mohammad462
Mon Aug 27, 2018 7:56 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

This polyfuse you said does not have my device. But I found it and it was exactly 5 volts. In photo 1. But a weird test. In the second photo, I connected the 1 and 2 with a single LED, it turned on, while the USBs were also energized and the mouse light turned on. http://s8.picofile.com/file/8335648...
by mohammad462
Sun Aug 26, 2018 5:25 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

Has anyone found a solution to my problem? :|
by mohammad462
Thu Jun 14, 2018 5:22 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

Is there a burning capacitor?
Or a simple transistor?
Guess what parts might be burned?
by mohammad462
Wed Jun 06, 2018 7:38 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

I can not send it back because it has no warranty.
So I have to fix it.
From there, I know that the mouse LED is lit for a second. Also, the lan LED also lights up.
by mohammad462
Sun Jun 03, 2018 7:46 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

There is one thing that is very strange for me.
When you connect the power supply, both the usb and the lan will be energized for a second.
by mohammad462
Sun Jun 03, 2018 2:43 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

Yes that's right.
What parts might be burned?
Please tell everyone about everything
by mohammad462
Fri Jun 01, 2018 5:51 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

Power supply output was measured with multi-meter. A new power supply was tested. Please say what you mean by the end of your speeches. I have not noticed. """" That said, if both the USB, and the ethernet are not functioning, I would assume the LAN9515 is not working either, (as that chip is respon...
by mohammad462
Sun May 20, 2018 4:41 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

billybangleballs wrote:
Sun May 20, 2018 2:43 pm
Good power supplies are often let down by cheap cables that are ridiculously thin and cannot pass the required current.
To solve this problem, I also used a power supply and another cable. But the problem was not resolved.
by mohammad462
Sun May 20, 2018 4:39 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

It could be that the LAN chip is faulty. Does it get hot? lan and wireless not work.no not hot Are you connecting USB devices directly into the pi or through a USB hub? I connect the mouse and keyboard directly to the device directly. When the power is connected to the device, the mouse light turns...
by mohammad462
Sun May 20, 2018 9:39 am
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

I checked the voltage. 5.2 volt.
The adapter used also produces 3 amps of current.
I also checked with another power supply, still showing that yellow mark.
The mark is not important. The main thing is that the usb does not work
by mohammad462
Sat May 19, 2018 11:10 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

Re: repair raspberry pi 3 b

thanks for your answer.
I do not understand what you mean.
The boot operation is fully executed and the operating system goes up.
Desktop is displayed.
But the USB ports do not work. Like the keyboard and mouse.
And still in the corner of the image, the yellow symbol blinks
by mohammad462
Fri May 18, 2018 3:25 pm
Forum: General discussion
Topic: repair raspberry pi 3 b
Replies: 29
Views: 3107

repair raspberry pi 3 b

My device has a picture, but the blue dot is blue.
All four usb numbers do not work.
The red LED lights up, but the yellow does not light up.
My device model is Pi3B v1.2.

#This text is translated from Persian to English by Google Translator#

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