T61 external monitor permenantl​y in sleeping mode

Greetings,
I want to run an external monitor with my T61 for desktop extention.  It was working fine, until I once booted up my PC before having switched on the external monitor.  Since that day I have never been able to display anything on the monitor.  It is just showing black, and the power button light is just flashing, which I assume means sleeping/power saving mode.
 I tried changing things on the BIOS, did not work. I even bought a minidocking station now, hoping that the new VGA-out would deliver results.  It also does not work.
I cannot believe the Thinkpad cannot cope with an external monitor not being on when the Thinkpad starts up.  How can I fix this? 
It does not seem to be the VGA port, since the docking station option also does not work, right?
Please help.
Regards,
Henning

Go into your display property, by right clicking your desktop, then select your second monitor and then tick the extend desktop box. 
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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