Replaced the processor. Everything is fine, but flash drives 2.0 do not work in one of the USB ports, but 3.0 works. Data lines 2.0 are not broken, but the resistance to data lines is different. The difference is 150 ohms. The resistance along the U2DN2_L line is 730 ohms, along the U2DN2_P line - 880 ohms. Other USB ports work properly. Could there be a problem with the processor? Removing the protective diode DS21 did not give a result, the problem is not in it. In Windows it displays with error message, when you put in flash drive there comes the same sound when you put it off and usb device dissappears in Windows. Any ideas?
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Re: LA-J812P USB 2.0 doesn't work
You need to be more clear with your observations. With "resistance along" you actually mean resistance to GND? If so, sounds awfully low already. If LS13 was already ruled out, same as with the resistors and caps on the USB20_P2 and USB20_N2 lines, then yes... you're likely dealing with a damaged AMD CPU.
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