Laptop internal display not work but external works

Dell Latitude d620 notebook computer - i...
May 9, 2012 at 06:13:42
Specs: Windows XP, Intel/1gb
I have a Dell Latitude D620 laptop that have display problem. I am sure the LCD, invert and cable are good since I have token them off and tested on another laptop and they worked fine.

The problem is
1. The LCD is totally dark, no any sign.
2. When an external monitor connected, it takes more time to boot to the system, and the usually display of DELL … and windows loading status bar are not show up. When external monitor light is on, the Windows is already started. i.e. you will not see the windows loading procedures as we usually see.
3. When I disconnected the internal LCD connection cable, the boot is fast and the initially boot dialog of DELL… and windows loading status bar all show up, which means very normal. But as I said before, I have tested the LCD, inverter, and cable on another laptop and they are all worked fine and I also used another laptop’s LCD, invert and cable on this laptop, and got same problem. So it’s not LCD problem, but why?

Anyone have similar problem and how to fix?

Thank you

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May 9, 2012 at 07:11:37

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May 9, 2012 at 09:37:48
No, it's not work.
further more, if I remove the hard drive, I can not see if it POST or not, even a external monitor is connected, Fn+F8 not switch the display. I can only hear a beep after awhile.

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May 9, 2012 at 10:05:07
Kinda sounds like something horrible has happened to the System Board, but localized between the GPU and the internal monitor cable.

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Related Solutions

May 9, 2012 at 11:22:00
Yes, that's also I'm thinking.
it's Nvidia chip. The chip should be ok because the external mornitor works,
Anyone knows the circuit to external port and to the internal LCD?

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October 28, 2012 at 07:03:58
I have the same problem, It works at an external display and the lcd and lcd cable work on another laptop.
The problem is that i have a sony vaio and it has no inverter, or at least i dont see one like an hp laptop for example. i tried to switch image from external monitor to lcd and it doesnt work. i tried everything. dont know what to do more, Hope you can help.
I have a Sony Vaio pcg-61813M.

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