Sounds like a bad inverter - but since this system uses the known faulty nVidia chip, it could be the video chip as well (yes, even if an external display is OK).
I am interested in EJN63's statement about having a good external monitor display even though the nVidia chip is bad. I have a D820 with Quadro NVS 110m that has had a pink background color on the LCD for about 3 months. It's a very even light pink color with no stripes, bar or other imperfections. The PC works fine otherwise. I do notice a slight out of registration in green colors especially on the startup screens.
Dell wants to sell me a new LCD but if it's the chip that's bad and new display won't help. Already tried a different backlight and the inverter seems ok. Will test with a known good inverter soon to make sure.
GPU-X.exe says the Shader Clock is at 0 MHz which seems strange since it's spec'd at 300 MHz which makes me suspicious of the chip.
Any further information on testing for a bad nVidia chip would be appreciated.
ejn63
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April 19th, 2010 18:00
Sounds like a bad inverter - but since this system uses the known faulty nVidia chip, it could be the video chip as well (yes, even if an external display is OK).
http://en.community.dell.com/blogs/direct2dell/archive/2008/08/18/nvidia-gpu-update-dell-to-offer-warranty-enhancement-to-all-affected-customers-worldwide.aspx
attoamp
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May 5th, 2010 11:00
I am interested in EJN63's statement about having a good external monitor display even though the nVidia chip is bad. I have a D820 with Quadro NVS 110m that has had a pink background color on the LCD for about 3 months. It's a very even light pink color with no stripes, bar or other imperfections. The PC works fine otherwise. I do notice a slight out of registration in green colors especially on the startup screens.
Dell wants to sell me a new LCD but if it's the chip that's bad and new display won't help. Already tried a different backlight and the inverter seems ok. Will test with a known good inverter soon to make sure.
GPU-X.exe says the Shader Clock is at 0 MHz which seems strange since it's spec'd at 300 MHz which makes me suspicious of the chip.
Any further information on testing for a bad nVidia chip would be appreciated.