Yes, but he said with standard kybd! Meaning stock unit kybd, or standard PS2 kybd???
I just had the same problem, as my unaltered, still in use unit had the clock drifted by almost ten minutes.
I plugged in a normal kybd, and got into the BIOS, and changed the time there. That did the trick.
In studying the power-up boot phase of the unit, it appears there is a small window of time around 6-9 seconds after the power button is pressed, in which it will respond to a ctl-alt-esc stimulus. Only one such instance of that key sequence is needed, if it is in the time window, i.e., no need to rapidly repeat the sequence.
If you miss the window, power will need to be removed and reapplied.
This is how MY unit responds, noting that older versions were easier to get into the BIOS.
BTW, the official iopener online help screens indicate that to change the time, you need to call the tech support, and they will do it for you. ...I like that! That means there are a whole lot of folks out there, still using the beast unaltered, that have drifted clocks, and no prayer for ever getting it reset.