I purchased arduino leonardo and usb host shield, soldered it as recommeded on many youtube videos to fix the no power issue.
I ran blinker test on leonardo, it was successful, ran some other tests, like manual println and stuff and it worked.
I updated all libs and also drivers for arduino.
Now i tried to plug in a phone, mouse into the host shield, but there is nothing happening, even more, as soon as i plug anything into host shield, the arduino disappears from the devices on my win 10, as if it is not connected. as soon as i remove a device from host shield, the arduino re-appears in devices..
I probably can not explain why your Leonardo disappears. But I see SPI in your screenshot and pins 11, 12 and 13 on the Leonardo are not the SPI interface (contrary to the Uno); it's only available on the 6 pin header marked below. If your shield does not have the matching pins, it will not work without hacking the shield.
Please post a link to the information that you found.
Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project See About the IDE 1.x category.
Thank you for finding time to respond to the topic.
The shield is exactly this one and it matches those pins
Also i don't know if it helps, but when i connect the device to the host shield, the L led next to ON led on leonardo, lights up(in yellow) and stays like that, does not blink or anything, just permanently lighted up, before that it blinks from time to time. As soon as i remove the device, it turns starts to dim for 5 seconds and then lights off and goes to blinking mode from time to time.
There was another topic describing exactly my issue, they responded with the same thing, they adviced to this one too, but i have done all those steps previously already.
Starting to think the board is faulty, waited for 3 weeks for board to arrive. sad day
It is certainly possible the board is defective but what are the steps you have
previously already done? If it involves soldering on the board, post a picture
of the board. Perhaps these cheap clone boards have new problems.
it came already soldered. as far as i knew, this boards came unsoldered and needed soldering, but it arrived soldered the same way i was going to do it, according to this video
I compared your board to mine (it works) and they look the same. There must
be more than one factory making these clone boards because the fonts for
the printing is different. The letters are smaller on my board but that
makes no difference to the electronics. Sorry, I can't help.
See 
