So ive had my N900 for maybe 2 or 3 months now, with minimal problems. But today the vibrate just stopped working all together, up untill now i havent had any problems with the vibrate. Vibrate is checked in both profiles but nothing, not when receiving txts, calls, boot up or when performing a health check. Vibrate did however work for ONE message after it stopped, then stopped again right after that one. Its really annoying as i like to keep my divice on silent and this makes it a little hard haha.
If anyone could help that would be great

echo 255 > /sys/class/leds/twl4030\:vibrator/brightness

as root would make the vibrator buzz once if it works. Maybe HealthCheck can do it too. If it doesn't work at all, I guess what I would do is backup everything and send it in for warranty repair.