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IBM T23 - keyboard problem


My keyboard is not working at all though I can move the mouse around the screen my friend check it and said the laptop says the keyboard is wrking fine though it does not repond to any keys

i tried that take out your battery but it doens't work though my firend says it can't hold a charge for long


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Re: IBM T23 - keyboard problem

Sounds like the laptop has a fault with the hardware regarding the keyboard. hand it in to your local pc repair shop and they will be able to give you a repair price

as a quick work around you can plug in a normal ps2 (pc desktop) keyboard this will temp fix your problem.

hope this helps !

Posted on Nov 06, 2007

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My USB keyboard and mouse work during BIOS setup but stop working at Windows log on. What can be done?

pick up and insert a usb keyboard with a touchpad, you can get them all day at Wal-Mart, and run your windows again. Sometime you also may have to wait up to 5 minutes to detect devices. also try using your Tab key to move around. All of this has worked for me in the past. Good Luck. Also try Safe Mode. Also try USB mouse. Good Luck.

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My laptop built in keyboard and mouse is not working where as USB keyboard/mouse is working properly


Go to the service center and give to repair may your keyboard connection is not working properly,

May 23, 2011 | Motherboards

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Sir, i want to know about the optical mouse in detail. what is the important point of it to use. thanks, tin

Optical mouse was developed by Agilent Technologies and introduced to the world in late 1999, the optical mouse actually uses a tiny camera to take 1,500 pictures every second. Able to work on almost any surface, the mouse has a small, red light-emitting diode (LED) that bounces light off that surface onto a complimentary metal-oxide semiconductor (CMOS) sensor.
The CMOS sensor sends each image to a digital signal processor (DSP) for analysis. The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the images and see how those patterns have moved since the previous image. Based on the change in patterns over a sequence of images, the DSP determines how far the mouse has moved and sends the corresponding coordinates to the computer. The computer moves the cursor on the screen based on the coordinates received from the mouse. This happens hundreds of times each second, making the cursor appear to move very smoothly.
Optical mice have several benefits over wheeled mice:
No moving parts means less wear and a lower chance of failure.
There's no way for dirt to get inside the mouse and interfere with the tracking sensors.

Increased tracking resolution means smoother response.
They don't require a special surface, such as a mouse pad.

Although LED-based optical mice are fairly recent, another type of optical mouse has been around for over a decade. The original optical-mouse technology bounced a focused beam of light off a highly-reflective mouse pad onto a sensor. The mouse pad had a grid of dark lines. Each time the mouse was moved, the beam of light was interrupted by the grid. Whenever the light was interrupted, the sensor sent a signal to the computer and the cursor moved a corresponding amount. This kind of optical mouse was difficult to use, requiring that you hold it at precisely the right angle to ensure that the light beam and sensor aligned. Also, damage to or loss of the mouse pad rendered the mouse useless until a replacement pad was purchased. Today's LED-based optical mice are far more user-friendly and reliable.

Thanks and regards,

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1 Answer

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  1. first check the bios.
  2. you can use serial mouse or keyboard change this parallel mouse and keyboard.

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hi im josh in cebu phils. may i help you? friend i had the same problem of you last month. then i found out that it was just a software problem. one of the files in my windows is missing thats why i cannot execute properly. try to reinstall your windows so that it will work. good luck friend try to vote me if it works so that i will know. bye.

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hmmmm maybe you have a motherboard defect.... or try to change your mouse or keyboard with a new or borrow it from your friend then try it... if it has the same problem your motherboard is damaged.. ^^

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Did you try removing each memory module individually... Instead of just moving them around.. because the error you are receiving is a bad memory error code.

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EHCI controller not detected

try installing the software drivers for keyboard and mouse.....then see whether keyboard and mouse is working...if the problem persists.....then the problem is in motherboard.....that you have to give it to repair that you can identify the problem.....i am a software engineer.....and i have experience in these areas....thats why suggesting you this idea....try will work 100%.....

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