Touchscreen stopped working + no HID in device manager + Unknown USB device
Hi,
My 7270 latitude touch screen stopped working shortly after first use (after win update worked again but for a short time).
All drivers are up to date.
In device manager a USB device shows as unknown (yellow warning triangle), otherwise there are no indications to the source of the problem. There is no other touch screen device showing in device manager.
Please power off system, remove all peripherals such as printer, Scanner, Media Card Reader, Small Media cradles (iPod, PDA, MP3 player, etc.), Digital Cameras and Video Recorders, USB storage devices, and CDs or DVDs from all optical drives. Remove AC adapter, wait about 15 minutes, and then power on system. Hopefully touchscreen work normally.
I'd suggest you download and run the free version of Malwarebytes - Official Site. The unknown USB device in device manager could be a nasty malware. If the Unknown USB device isn't a malware, I suspect the (Chipset) driver to be corrupt therefore, I suggest you run the System file checker. It scan for any corrupted system files that could be causing problems and fix those corrupt files as well.
a) Press Windows key + X key at the same time, select Command prompt (Admin)
b) In the command prompt type the following command: sfc/scannow and press enter
If no corrupted system files were found , then I would suggest you try the following steps:
a) Select Command prompt (Admin)
b) In command prompt, type the following commands and press Enter after each command....
LSUFAN51
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Posted August 27th, 2017 18:00
:emotion-2:
I'm assuming windows 10 is on the system...
Please power off system, remove all peripherals such as printer, Scanner, Media Card Reader, Small Media cradles (iPod, PDA, MP3 player, etc.), Digital Cameras and Video Recorders, USB storage devices, and CDs or DVDs from all optical drives. Remove AC adapter, wait about 15 minutes, and then power on system. Hopefully touchscreen work normally.