12-02-2011 04:31 AM
Upuntil a few days ago I could connect an external monitor (Dell1905FP) via VGA cable to my Thinkpad Edge 15" (0301CTO) and everything worked fine. The Thinkpad is running Win 7 (64 bit).
Now when I connect the Dell monitor my Thinkpad display immediately goes blank. When I remove the cable it comes back on again. When these two are connected the Dell monitor is unable to detect the Thinkpad display. I am of course unable to check if the Thinkpad can detect the Dell monitor. Both the Dell monitor and the Thinkpad display work when not connected.
I have tried connecting the Thinkpad to an alternative external monitor (Viewsonic VG2428WM) using a (different ) VGA cable and it works fine.
I have tried using the "working" VGA cable between the Thinkpad and Dell Monitor but this makes no difference.
Can anyone suggest what the problem might be?
12-04-2011 07:20 PM
12-05-2011 04:35 PM
Thank you for taking the trouble to respond.
I have now resolved the problem - I'm not sure how!. I have done a system restore to exclude a number of windows updates and everything is now working as it should.
Unfortunately I have not yet managed to identify which particular update caused the problem - if I do I will rport back.
Once again thankyou
12-09-2011 11:14 AM
I am having the same issue. Yesterday eveything was fine, today if I try to connect my external Samsung monitor the laptop screen goes blank. I installed the latest Windows updates, and ran the Thinkpad diagnostics, no change. Shutdown the laptop, removed battery, rebooted, everything....help!! thanks, Tony