Steps to fix a laptop that doesn’t recognize the keyboard

Laptops used for a very long time  can not keep away from keyboard-related ailments: Listing quite a few keys, press 1 key to output quite a few numbers. Cannot even press any key. There are lots of causes of laptop computer keyboard issues.

Because of home windows error, the machine is contaminated with a virus.
As a result of flawed language, press 1 key to get an odd quantity.
The character of the keyboard is shorted.
Because of failure {hardware}.

With the above circumstances, you reinstall home windows, clear or attempt one other keyboard. If not, carry out a {hardware} test. On this article, I’ll information you on tips on how to repair a laptop computer that doesn’t acknowledge the keyboard throughout the {hardware}. In addition to the mainboard illness, the laptop doesn’t acknowledge the keyboard. Laptops even have the next causes:

Lack of 5V voltage for keyboard cable connection pin.
The SIO chip is damaged.
As a result of the SIO chip itself is defective.
Because of being detected or shorted by the filter capacitors on the Knowledge or Clock information pins.
Because of BIOS program error.

Circuit working precept:  IC SIO controls the keyboard via sign traces:

Knowledge – Knowledge transmission line.
Clock – Clock Clock.
The keyboard driver is managed by the BIOS.

Steps to repair a laptop computer that does not acknowledge the keyboard: It’s best to do it from straightforward to tough lest you misdiagnose and provides beginning to a different illness

Strive one other keyboard to see if it is throughout, most keyboard errors are as a result of nature of the keyboard being short-circuited and damaged.
Take away peripheral gadgets: DVD drive, speaker jack, WIFI, USB connection jack to see if it is gone or not.
You measure on the connection socket to see if there’s a 5v supply for the keyboard to work. This 5V supply is obtained from the earlier provide (have not turned on the machine but), dropping 5v could also be on account of a damaged circuit. As a result of the facility provide first has to start out the machine. If there’s 5v with out receiving the keyboard, we proceed to exchange or take away the filter capacitor.
Utilizing the  schematic laptop computer being repaired, discover the filter capacitor connecting the info and clock pins. Then substitute the filter capacitor or take away it to see if the keyboard is acknowledged.
Reload the BIOS for the laptop computer, so discover the BIOS that has been examined alright to load. Be aware earlier than reloading the BIOS, keep in mind to again up the outdated BIOS lest you kind the flawed illness, or the opposite BIOS isn’t appropriate. Actually, I fastened the Dell N4110 core i5 laptop computer once I press the quantity 2 key, the 7231 key will output, or the s key will output wdse.
If you have not handed the above steps, you proceed to swipe the SIO chip pin, if not, change one other IO chip. Most at this step, the machine has obtained the keyboard, if it will probably’t get replaced, solely the southbridge chip is left, reheated or changed.

Please take note of rigorously manipulate when changing the SIO chip and the South chip, lest the machine can not set off the supply. Good luck to you guys, trying ahead to your sharing.