Left my Metcal PS-900 for days on, now it doesn`t work.

[Neshco]

Any advise where to start with troubleshooting with this soldering station?
I left it accidentally work for few days and recently found that.
Green indicator light work, there is some resistance inside the cable of the tip, but it doesnt heat.
Any tips appreciated.

[artag]

Have you tried another tip ? They do die, even in ways that leave the green light on.
If you feel you'd rather not replace the expensive tips until you're sure it's dead, buy one that's a usefully different shape so it's not wasted. Also look at replacements from thermaltronics (though I think for a PS900 you have to change the handle too).

[Smokey]

Ya, the tips have a run time.  That's why you can find used tips on ebay pretty often.  Companies replace them when their guaranteed run time has been used up even through they still work for a while after that.

[ardiesse]

Check the internal power supplies.  I had a Metcal MX-PS5000 stop working, with the same symptoms.  The oscillator power supply failed.  The cause was a shorted diode at the output of a switching regulator.

[Neshco]

Just for the record, forgot to conclude this one, needed to replace the coil. Now is up and running again.
Thank you all for answers.