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60635
March 20th, 2009 01:00
Latitude D620 display problems
I got one of these systems in for a repair recently. The laptop when I received it would not display any image on the LCD when booting; no flickering, not dim, just no picture at all. It displayed fine on an external monitor, so I went ahead and replaced the LCD + inverter + backlight. After the repair, I am having the same issue: no display on the LCD, but the external monitor runs just fine.
The research that I have done indicates that the nvidia driven boards are prone to this type of failure. I was wondering if this means that I need to replace the system board, or if there is an intermediate repair that I should make first. Additionally, if I do need to replace the motherboard, is it worthwhile to simply downgrade to the mobo with intel graphics, or are the replacement nvidia boards sufficiently resilient?
Thanks in advance.
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husky0894
1.6K Posts
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March 20th, 2009 05:00
While the nVidia chips in this model are known to fail, when they do, the symptoms are not as you describe and generally affect both internal and external displays.
Was the replacement LCD new? If not, and it had a lot of hours on it, it may just be that the backlight or inverter failed again.
sekotwana
21 Posts
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March 20th, 2009 05:00
no wrong information Dell is giving a part that was tested and working, even if is not new but it is tested by the expects.
sekotwana
21 Posts
0
March 20th, 2009 05:00
i will suggest that if you still have the same problem after changing the lcd you will update the bios and chip set, utilities and the video drivers then try again. but if still the same problem, motherboard need replacement.
Hraedon
3 Posts
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March 20th, 2009 05:00
The replacement was new, and included new backlight and inverter. When I run the diagnostic test (at boot), the bars displayed on the external have the same sort of distortion and corruption that would signal GPU/memory problems on a desktop.
I'll update the bios and see what happens. Are there any other tests I can perform to try and narrow down the cause of the problems with this laptop?
husky0894
1.6K Posts
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March 20th, 2009 06:00
Before you pay to do this, note that the D620 is among those Dell has extended the warranty for - by one year beyond the end of the warranty you purchased at the time you bought the system:
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
sekotwana
21 Posts
0
March 20th, 2009 06:00
if the problem is happening on both lcd and external monitor it need the update and if still nothing is helping, you can replace the motherboard.
Thanks
Hraedon
3 Posts
0
April 25th, 2009 08:00
Just for google purposes, I replaced the system board and LCD.This solved the problem; neither worked without the other, but with both parts replaced the system works just fine.