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I have a problem where the light on my optical PS/2 mouse goes out for a few seconds. When it goes out, the cursor stops moving, but clicks still work.

I have already tried another mouse and it experiences this same problem. I have also reinstalled Windows, restored the mouse drivers and changed the mouse buffer size to no effect.

What can I do to fix this?

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Maybe a faulty PS/2 port. Have you tried the other PS/2 port? Usually there's two, and often they'll work for either the keyboard or mouse (you may have to hard-reset or power cycle to get it to recognize the port change). Did it ever work right? – Ƭᴇcʜιᴇ007 Jun 9 '12 at 17:35

If this problem is reproducible using another OS (e.g. a Linux live system like Knoppix), I would suspect a loose contact on the PS/2 jack/PCB. This would probably be easy to fix if you are used to solder, but a rather high risk to damage the mainboard further if you are not.

Would using a USB mouse be an acceptable solution?

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Most likely a faulty PS/2 port, can you try the device in another PC, maybe time for a USB related upgrade :)

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