Computer can not Read USB Card TroubleShooting
Computer can not Read USB Card TroubleShooting
Problem: USB, laptop computers suddenly prompted not recognized, is still not recognized after restart, reinstall the system always remain in the wait stage, but has been shown not be installed. Previously had such a problem occurs, when the computer all the formatting problem is solved, but not 1 month this problem has emerged.
This problem there are two possibilities: First, the computer does not recognize USB devices. Second, the USB device is not recognized by the computer. We need to determine a computer's USB device problem or issue sony dsc-w50 battery. Other USB devices can be used to test the computer has no problem.
If it is computer problem, your computer is not damaged by the virus. USB2.0 driver is not installed or version not compatible with good. There is no software conflict (first solve the software problems). Normally out of a prompt to install the driver.
If the computer hardware problems. We first measured with a multimeter the four USB cable (red white-DATA-+5 V Data - Green DATA-data - black ground) multimeter to the red pen on the black pen measurement (white line and the line resistance is not a difference of Lu 50 in Europe, which two lines are from the south bridge out, if the change in resistance is too large, you can determine the southbridge problem. that the internal USB module burned in the South Bridge. In to see what the USB device driver now many have. Even without the driver will not come out does not recognize the situation.
There are several unrecognized cases. Or a USB data cable barrier is generally bad for a long time contact with that place inside the rust may have swelling and there may be something in there blocking thingshp pavilion dv6000 battery. Second USB cable barrier. What the response would not be unreasonable red, white line barrier can not be identified. Green Line barrier is not recognized. White line and green line can not be reversed. Is not recognized. Black line barrier does not respond, this measurement method has been mentioned above. Attention. Red can also lead to 5V voltage and low can not be identified. Three USB board internal problems.
Cause: There may be caused by a virus infected laptop, cell plate when the computer all the files and all the cells the virus out, or you already removed the file to with the virus, so the computer can re-run again. But when installed on your computer, then turn back when they file transfer back.
Solution 1: The computer virus completely, with good, reliable antivirus software processing computer, the killing out of some stubborn viruses, notebook can resume normal use. In the course of normal use, be careful not to some sites with a virus, a download, be sure to use the file after the virus. Good habits to maintain the healthy operation of the computer for a long time.
Solution 2, USB jack can work is set sony np-fc11 battery, it is estimated that the virus changed this one to put antivirus software open, open the regular anti-virus program, regular protection.
Solution 3, try to manually recover usb jack (in the "Run" dialog box, type "regedit", enter, open the Registry Editor, expand the following branch [HKEY_LOCAL_MACHINE SYSTEM CurrentCntrolSet Services USBSTOR], in found in the right pane named "Start" in the DWORD value, double click the dialog box will pop-up editor to modify its value data for the sixteen hexadecimal value "4." points "OK" button and close the registry editor, restart the computer, the settings take effect. restarts, the USB storage device when someone connected to the computer, although the indicator light on the USB device in the normal blink, but in the Explorer can not find the letter which is so will not be able to use USB device.)
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