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Num Lock + Cap Lock + Scroll Lock Blink

By joel.francis ·
Non-stop blinking from Num Lock, Caps Lock and Scroll Lock LEDs and can't turn them off.

Three (3) servers sharing one keyboard and one monitor occupying a Cybex SwitchView switching device but unable to access any machines.

The screen indicates the computer is "in use" or "locked" and to press CTRL-ALT-DEL. Keyboard is unresponsive. How do you "unlock" the systems?

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by BHunsinger In reply to Num Lock + Cap Lock + Scr ...

First, Check your documentation and switch the servers being displayed to see if the problem is an nonresponsive keyboard or a server. Switch them manually if that option is available. Does the mousre work? If not, then :
Second, get a couple of known good keyboards, monitors and mice to bypass the KVM switch. Shut down servers then attach and reboot. Can these servers be acessed remotesly to do so? Hmm! are they being remotly accessed now?
Third. Now log into each server. If they all work, the issue is either the kvm switch/keyboard issue If one of them doesn't. Thats the problem.

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by joel.francis In reply to

Unfortunately shutting down and rebooting the servers did not resolve this issue.

Yes, it was a good thing I could connect the servers remotely and the mouse works. Only the keyboard was unresponsive until it was unplugged from the Cybex switching device. It's working
now (no flashing lights).

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by Toivo Talikka In reply to Num Lock + Cap Lock + Scr ...

Last year I installed a lightweight (in more sense than one) KVM switch and saw how it continuously generated mouse port interrupts into the event log of the two Windows NT servers, the W2K server was not affected. After the KVM switch was replaced, the problem disappeared.

Have you checked if the mouse and keyboard connectors are OK, any bent pins?

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by joel.francis In reply to

I checked for bent pins on the mouse and keyboard connections and these were fine. When I replaced the keyboard cable (after unplugging it), the LEDs stopped blinking. So far so good....

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by Neil Cotton In reply to Num Lock + Cap Lock + Scr ...

Some KVMs give the option to lock the inputs, and also give a sign that it is locked, such as flashing lock lights. Check your KSM switch manual/website, you will normally find that presisng "scroll lock twice and a action key" will acess KVM switch commands. Might be worth a look.

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by joel.francis In reply to

Great, keyboard shortcuts are useful. Press Scroll Lock twice and "an action key" but which is the action key? Is there a generic keyboard shortcut combination or does it vary depending on the brand, model, etc. of the switch?

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by jpomposelli In reply to Num Lock + Cap Lock + Scr ...

If I am not mistaken, the flashing of the leds mean the kvm is expecting you to tell it which machine you wish to connect to. Until you select a system, the keyboard will not work. Press a letter that corresponds to the server. Or if you press the Esc key, that will cancel the request. The request is usually started by pressing the Ctrl key twice.

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by joel.francis In reply to

Will try these hints next time I encounter this situation but the keyboard was unresponsive so pressing 'Esc' or 'Ctrl' twice may not have worked.

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by joel.francis In reply to Num Lock + Cap Lock + Scr ...

Thanks to all who responded for this advice. It turns out when I replaced the keyboard cable (after unplugging it) from the KVM device, the LEDs stopped blinking. So far so good.

Thanks also for the Scroll Lock keyboard shortcut which I will try to remember if this situation occurs again.

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by joel.francis In reply to Num Lock + Cap Lock + Scr ...

This question was closed by the author

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