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Malfunctioning Keyboard After Using Laptop To Power A Device Via USB Cable


catspurrrr

New Member
Posts
1
#1
Two days ago I used my laptop to power a device via a usb connection. After I removed the usb cable the keyboard starting malfunctioning. When pressing the keys some would not type at all, some would type the wrong character, and some after pressing the key just once would type multiple wrong characters, not allowing me to backspace to delete them.

I did both a system restore and when that did not solve the problem I reset my laptop to factory settings and still have the problem. I also went in thru device manager to uninstall/update the keyboard settings but it didn't help. Since the problem started I keep getting CPU usage warnings. The keyboard issue began just after plugging in and removing the usb device and I think the problem lies there but I don't know what else to try. I have used a newer laptop to power the same usb device with no problems. In the recent past I was able to import photos from my sony camera to it via usb cable with no malfunction. The afflicted laptop is a Toshiba satellite L75-B7270 (2013), os windows 8.1. This is the first operational problem I have had with this laptop, although lately I have noticed a vague unspecified "clunkiness" to it. Toshiba support has an online pc troubleshooter scanning option but I am unable to access it due to the keyboard problem.

If anybody has any suggestions please let me know. I don't have much tech experience and my attempts above were done by merely entering questions in a search box. Even though the computer has not been used hard I don't want to spend money fixing it since it is 7 years old. Thank you all!
 

My Computer

System One

  • OS
    8.1
    Computer type
    Laptop
    System Manufacturer/Model
    Toshiba satellite L75-B7270

A Guy

Righteous Dude
Team Member
VIP Member
Gold Member
Bay Area

Posts
23,534
#2
Welcome to Eight Forums ;) I'm no laptop expert, but have had people have success with removing AC and the battery. Press the power button for 15 seconds or so to discharge any capacitors. Let it sit 1/2 hour, then reinstall battery and/or AC power and check it again. Good luck.

My second thought if that didn't work would be to boot to Safe Mode with Networking, and see if the issue remains in Safe Mode

Safe Mode - Start Windows 8 in

A Guy
 

My Computer

System One

  • OS
    Windows 10 Home x64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Custom
    CPU
    INTEL Core i5-750
    Motherboard
    ASUS P7P55D
    Memory
    KINGSTON HyperX Fury Black Series 8GB (2 x 4GB) 1866Mhz
    Graphics Card(s)
    EVGA GTX750
    Monitor(s) Displays
    LG 27MP33HQ 32" IPS LED
    Screen Resolution
    1920 x 1080
    Hard Drives
    Samsung 840 Evo 120 GB, 2 x SEAGATE 500GB Barracuda® 7200.12, SATA 3 Gb/s, 7200 RPM, 16MB cache
    PSU
    ANTEC TruePower New TP-550, 80 PLUS®, 550W
    Case
    ANTEC Three Hundred Illusion
    Cooling
    COOLER MASTER Hyper 212 Plus, 3 x 120mm 1 x 140mm Case
    Internet Speed
    20 + Mbps
    Browser
    Vivaldi
    Antivirus
    Avast
#3
I might have missed it, what happened when you plugged in a USB keyboard - did that work? Reason for asking: if another KB works, I'm hoping that means the mobo KB controller is aok.
 

My Computer

System One

  • OS
    Windows 7 Pro 64bit [MS blue-disk set]
    Computer type
    PC/Desktop
    System Manufacturer/Model
    2 Acers & 1 Antec[?]
    CPU
    i7 in 2 Acers, i5 in desktop
    Motherboard
    Desktop w/Gigabyte
    Memory
    Two w/16GB, 1 w/8GB
    Graphics Card(s)
    Laptops GameWorthy; Desktop maybe GameWorthy
    Monitor(s) Displays
    flatscreens; 2 are BluRay worthy
    Screen Resolution
    1368x768; 1600x900
    Hard Drives
    1TB internals; 2 ext usb WD 1TB HDs
    PSU
    what's PSU?
    Cooling
    Regular plus external fans
    Keyboard
    desktio w/PS2
    Mouse
    desktop w/PS2
    Internet Speed
    DSL middle level [160?]
    Browser
    from Netscape 0.9 to FF 36
    Antivirus
    well-balanced, well-configured mult-layered defense is best
    Other Info
    From MS-DOS 3.3, MS-DOS 6.22, from Windows 3.1 to WFW 3.11 to Windows 95-98SE, now to Windows 7 Pro.
    Security for now: Windows 7 Firewall, Emsisoft AM, MSE [scan-only], SpywareBlaster, Ruiware/BillP combine

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