Keyboard replacement how do i replace the keyboard on a lifetop c ?

Connect to external usb keyboard to check. If works ok, your keyboard is defective and you should change it.
See tutorial
How to replace or remove keyboard on Lenovo G500 keyboard replacement

How to replace the keyboard of Lenovo g500 g510 g505

LENOVO G550 Keyboard Installation Replacement Guide Laptop Remove Replace...

Lenovo G580 G570 G500 G510 disassembly replacement keyboard hard disk full...

A warning: might look easy but if you are not really familiar with dismounting a laptop, you might end taking your device to a repair shp in a shoebox.

To determine if the keyboard or the keyboard controller is faulty, plug an USB keyboard into the USB port on your laptop. If all the keys are OK on the USB keyboard then the laptop's keyboard is faulty and needs to be replaced. If the USB keyboard also malfunctions then the keyboard controller chip on the motherboard is faulty, then the motherboard needs to be replaced, but this may not be a cost effective solution.
A replacement keyboard for your model laptop maybe available from this WEB site.Keyboard replacement, LCD screens for mobile phones, Ipods and computer equipment. http://www.yallstore.com/index.php?main_page=advanced_search_result&search_in_description=1&zenid=1lrjst3ncshlb4c7frn9bev3c3&keyword=keyboards

Connect an USB keyboard to your laptop and if the keyboard functions normally then you need to replace the laptop's keyboard or just use the USB keyboard.
You maybe able to get a replacement keyboard fron this site.
Keyboard replacement, LCD screens for mobile phones, Ipodsand computer equipment.http://www.yallstore.com/index.php?main_page=advanced_search_result&search_in_description=1&zenid=1lrjst3ncshlb4c7frn9bev3c3&keyword=keyboards

Please try to clear the connector of the keyboard and fix it correctly, it may solve the problem. else you have to replace the keyboard.



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In these situations its usually easiest to just replace the keyboard. Replacement keyboards could be purchased here. The service manual for your laptop can be found here. The section for replacing the keyboard starts on page 57.

I hope this helps

Ray

Judging on your symptoms, it sounds like a replacement keyboard might be in order. If the machine is out of warranty, you can purchase replacement keyboards yourself.
Search "(computer model) keyboard" into eBay. You should see many products available for a reasonable price.
You should have a screw or two on the bottom of your laptop that have a keyboard icon next to them. Removing these screws should allow you pop the keyboard out and replace it. There is also a ribbon cable under there, so be careful when removing. For more info, search "replace (computer model) keyboard" in YouTube or a similar site. There should be many tutorials on keyboard replacement.

Replace the inside of the keyboard with a new piece. One of the major problems with Dell keyboards is that the plastic pieces holding the keys in place become loose or broken. You can find a cheap keyboard from Papatek.com or an electronics store. Simply take apart the new keyboard, pull the keys off your keyboard, lay the plastic piece on top and replace your keys.
http://www.papatek.com/Acer-Keyboard/Acer-Travelmate-8100-keyboard.html

Buy a replacement keyboard. They are very easy to replace.Very cheap price:http://www.notebook-parts.ca/black-hp-pavilion-dv6000-keyboard.html

actually the keys are not replaced its the whole keyboard which needs to be replaced ....also its not a costly thing to get a new keyboard for the computer.

there are ways to replace laptop keyboards but it is expensive. try going to a computer repair shop, they may have a broken laptop with the same keys as yours. you can also get a external usb keyboard.