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Re: booting with no keyboard or moue - frying mb

On Sun, Feb 17, 2002 at 11:37:21PM -0800, Osamu Aoki wrote:
| On Sun, Feb 17, 2002 at 07:57:36PM -0800, Alvin Oga wrote:
| > donno... i've plugged and unplugged various mouse and kbs
| > all the time into lots-o-mbs and machines and have not
| > yet fried any mb... ( guess i can consider myself lucky...
| True but if you think about it, it may be true PS@ is dangerous.
| If I remember, PS2 bi-directional I/O lines are open collector output
| and input with pull up registers.  If some static charge hits input when
| unplugging KB, this may cause latch up of CMOS input circuit if
| protection circuit does not work right.  Old cheap CMOS device without
| protection circuit will cause large current shortage between power line
| and ground upon latch up.  Thus toasted MB.
| Modern I/O chips should be smart enough to deal with this ...

Thanks for the detailed explanation of what actually happens.  It is
much more helpful than a repetitive "yes it does" "no it doesn't"



After you install Microsoft Windows XP, you have the option to create
user accounts.  If you create user accounts, by default, they will have
an account type of administrator with no password.
                                                            -- bugtraq

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