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Computer won't start...UNLESS...

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by powlboyjr

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I have a computer at work that will not start unless you have a mouse plugged into the ps/2 port. It normally uses internal bluetooth wireless mouse and keyboard. These both work fine when the computer is booted using another mouse.
The computer is a Gateway profile 5.5. Is there a possibility of a short in the mouse port? We had a few power outtages yesterday and this seemed to have caused the system to malfunction. Thank you.

4 replies

by thumbsup2

Have the Tech at work check the BIOS settings to see if there's an option to Halt on all errors except mouse/keyboard. If this is set to halt on all errors, period, the missing mouse in the PS2 port might prevent it from booting.

by tintoman

That the problem will be in the bios settngs, however I suspect this problem is caused by the way the usb legacy support has been configured, for example if you enable legacy usb support on some computers, they think that any usb device that is plugged in is a bootable device, this is typical of Dell for example, however hopefully there will be an option to enable legacy support (no boot) otherwise you will need to disable legacy support and disable the ps2 mouse, this will mean though that your bluetooth devices probably wont work until windows is loaded

by sdrucker

Check for bent pins.
The power outages may have also goofed up the PC's bios/sleep state settings. Pulling the CMOS battery from the motherboard for 20 minutes may reset that, but the problem you are describing is something that sounds like slow-roasted mouse, especially since "another mouse" has it working.
The USB ports or devices may have taken an electrical blow causing a short to the bus.

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