I have an XP machine running SP3 that won't wake up from stand by. Well, it WILL wake up from stand by, but between 5 and 30 seconds after I type in my password I hear a <cronk> noise from the speakers and then the whole thing locks up tighter than a drum. No mouse, no keyboard, no front panel power button, nothin'. The only way I have found to recover from that is to remove power and then reapply.
After this crash, sometimes the fans in my machine spin up to jet-taking-off volumes. I can't tell if this is the case fan making the noise or the graphics card fan (I'm using an ATI Radeon X1650).
These quotes are from this thread and the other thread you started on the - will not wake up from standby - weel it does wake up but then locks up.
Could the first quote be the Start Windows sound - that is then corrupted by the system fault.
Re the second quote I have just noticed that this problem started after you had cleaned the case and fans using an air duster spray or similar.
Directing that at the fan blades, can cause the fan to spin so fast that it destroys the small bearing/running sleeve.
Just an idea.
I do not think the suggestion on the other thread that the SP3 update has damaged critical system files is relevant to this. If SP3 is installed manually then there are particular steps to take, before downloading and installing SP3 but on automatic updates, as far as I understand the situation, Micorosoft updates will ensure your system is ready for SP3 before installing it.
rshaffer61 - not staying on this, got one going on another site that is taking up all my time. Just dropped in while waiting for the latest on the other site.