Dell Laptop turn off when press capslock

[eniac22]

Dell Inspiron 3542 turn off when i press the caps lock key even in the bios, i have try other keyboard but with no result.
Do not do it when i run the keyboard test from Dell diagnostic tools.

[techman1025]

Re: Dell Laptop turn off when press capslock

Hi
Retest with a external usb K/B and internal K/B unplugged ?
Let us know what happens
Techman1025

[eniac22]

Re: Dell Laptop turn off when press capslock

Hi
Retest with a external usb K/B and internal K/B unplugged ?
Let us know what happens
Techman1025

Without the internal keyboard and with a usb keyboard is make the same when i press the caps lock the laptop turn off

[petehall347]

Re: Dell Laptop turn off when press capslock

try running a live operating system and see what happens ..

[ktmmotocross]

Re: Dell Laptop turn off when press capslock

try running a live operating system and see what happens ..

"even in the bios"

[eniac22]

Re: Dell Laptop turn off when press capslock

When i run the keyboard test from dell diagnostic cd caps lock work ok

[petehall347]

Re: Dell Laptop turn off when press capslock

is keyboard set to correct one in the operating system ? this is why i suggested trying live system to see if software issue .

[ala_borbe]

Re: Dell Laptop turn off when press capslock

if it is same thing wint usnb keyboard and internal keboard disconnected then you ruled out keyboard

check resistors near keboard connector or kbc... might wana try reflashing bios

[piernov]

Re: Dell Laptop turn off when press capslock

Something with the caps lock LED circuit perhaps?

[petehall347]

Re: Dell Laptop turn off when press capslock

see if sticky keys has been inadvertently enabled.

[eniac22]

Re: Dell Laptop turn off when press capslock

is keyboard set to correct one in the operating system ? this is why i suggested trying live system to see if software issue .

It's not a software problem because he make the problem even when i am in the bios

see if sticky keys has been inadvertently enabled.

a use external keyboard without the internal keyboard connected

[petehall347]

Re: Dell Laptop turn off when press capslock

maybe caps lock shorted led as suggested already .

[luckydog23]

Re: Dell Laptop turn off when press capslock

I want to buy a laptop about 400 dollars. I don`t play games and it is just for working.
After I read the link, I am very puzzling. If you ever used one of the models, can you give me some suggestions? Thank you very much!
http://pc4u.org/best-laptop-under-400-dollars/

[techman1025]

Re: Dell Laptop turn off when press capslock

Ok this is what I would do no power to board at all put your meter on diode mode the red probe on ground black probe on the data lines at k/b connector check resistance on each line they should be close in value also press the cap lock key when testing that line see if resistance changes
Techman1025

[piernov]

Re: Dell Laptop turn off when press capslock

@techman1025 it's doing the same thing with a USB keyboard so I don't think he'll see anything on those lines. Except the LED one, since the KBC will output a signal to turn on the LED even if the keyboard is disconnected. If it is shorted to ground (before or after the transistor driving the LED) it may cause the computer to shut down.

[techman1025]

Re: Dell Laptop turn off when press capslock

Hi
The test was to comfirm to me that KBC/ firmware is the problem.
Techman1025

[Seagorman]

Re: Dell Laptop turn off when press capslock

Hi,
Do you know if the laptop was the victim of any liquid spillage ?, i had a Samsung recently that had a similar issue when pressing the letters K, L, M. the owner had informed me of a small spillage some weeks prior to the issue occurring, inspection of the Keyboard, its connector & Mobo showed little damage other than a minuscule dried liquid spot at the keyboard connector, cleaning with isopropyl alcohol did nothing to resolve the problem however changing the keyboard did, obviously keyboard short, might be worth checking for spillage ???