Dell :: External Displays Stopped Working

Mar 3, 2010

I have a Dell Inspiron 1520 with an Nvidia 8600gt. I have a dell 2409 24 inch 1920 x 1080 monitor and a Samsung 22inch 1680x1050 LCD TV. I use one or the other depending what room I'm in. Both are connected using VGA cables.

These have always worked perfectly, today when I tried plugging into either one they are detected as 'generic non pnp monitor' and I get a choice of standard resolutions up to 1600 x 1200. These always used to run at their native resolutions and were detected as Samsung and Dell.

I have reinstalled the display drivers, power cycled everything, gpu seems to be running fine according to gpu-z.

I have reverted to a working backup but that made no difference. Im using windows 7 64bit.

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We have 2 new T440p (i7 4800MQ, 16gb, ssd) which we installed with clean Win 8.1 and the newest drivers (intel hd 10.18.10.3345, nvidia 9.18.13.3182).

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In all configurations we have the same problem: Between every few seconds and about 20 minutes the external screens flicker and get rediscovered. Often this happens in Chrome or when doing some graphic-intensive stuff, but we cannot trace it down. Takes a few seconds to rediscover and all windows not in fullscreen are resized afterwards, because of display resolution detection and mostly we get the Display port new topology notification... We already tried with disabling the nvidia via the nvidia gpu settings and only using hd graphics but that didn't work.
 
A few years ago I had problems with my T400 discrete grafics, but then I could disable it in the BIOS which does not seem to be possible with the T440p...

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I have two questions .....

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however three months have passed and im not going to phone them and ask them to come get it ....and also what can i do to get the machine back to working properly ... ie how can i find out if it definitly is the graphic card and what are my

options .... are the 9800 cards plauged with the same problems .
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I have an Inspiron 1720 laptop. It will be 2 years old this coming Christmas...and I ain't got the extended warranty so no go on sending this thing back to dell.

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~~UPDATE~~
My fan is working now. I don't know if I jumped to conclusions whenever my fan wouldn't turn on after a good 20 mins or so of just web surfing. So I decided to just hop on a game and play. Then there it was not even 5 mins into playing the fan kicked in and starting pushing out hot air very nicely, but I did look at the temps on SpeedFan and during gameplay my GPU would reach 140F and CPU would get at like 130-135F. My idle temps are still high in my opinion. The GPU idles in these ranges 125-130F and CPU at 100-110F. Is these temps normal? .....

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