0

Today I spilled some water on my notebook computer. It worked fine for an hour afterwards, but then the keyboard went crazy: some keys stopped working, others were producing the wrong letter, or combinations of letters, infinite loops, etc.

Even if I immediately soaked up the spill, I am sure that some water got into the keyboard (my keyboard as a metal plate under it, so the water remained trapped in there). Since there is no way to disable a keyboard in windows 7 (if you uninstall the driver, it will be reinstalled by the OS at the next boot), I rebooted. My notebook beeped for a while during boot, but booted successfully. So the only option I had was to disconnect the keyboard from the MOBO and plug in a USB keyboard.

My question is about the beep: why did the computer beep during boot? I would think the OS would beep if no keyboard is found, but why if there is a keyboard (even when broken)? What kind of test is performed on the keyboard?

  • 2
    First of all, if you spill water on your notebook, immediately turn it off, unplug AC and battery and let it dry out for at least a day. Then, take it to a repair shop. – redbeam_ Nov 10 '15 at 20:47
  • 1
    The OS does not perform any tests on the keyboard during boot. – qasdfdsaq Nov 10 '15 at 20:52
1

The BIOS (not the OS) asks the keyboard to perform a self-test during POST.

If the keyboard reports a problem, the BIOS beeps. Your keyboard is failing, so it's beeping to let you know something is wrong.

Since you spilled liquid into it you've probably shorted a path, causing a key to appear to be stuck down, which can/will cause the keyboard to report an error during POST.

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.