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10355
February 2nd, 2015 22:00
Laptop LCD Display showing nothing.
I shutdown the laptop yesterday night. Tried to switch it on in the morning but the LCD display won't come on. The Windows boots up , the fan rolls , the DVD drive shows activity , i can hear sound of windows booting up but no display on screen.
On looking through the forums i came upon some tests to isolate the problem.
I tried:
1. The LCD BIST(Built in self test) : Passes. All colors are displayed with no distortion of any kind. Crystal Clear display.
2. Connect Laptop to an External Display : Pass. I connected to a VGA Monitor. The Display comes on . I am typing this post using the external display infact.
As both these tests have been passed by the laptop . I don't know what the problem is. Is it the Cable or something else? Please Guide.
Thanks in advance.
Vanjul.
Vanjul
5 Posts
1
February 4th, 2015 08:00
Hi,
Thank you for the prompt reply. One thing i would add is that i found the display was not blank but VERY dim such that it was almost invisible.
I checked with a local technician. He changed the display cable but the laptop screen still had a very dim display.
The remaining culprit was the motherboard. I made him check it and found that some transistor responsible for brightness control has gone bad. He replaced it and Voila!
The display is back to normal. Thanks for the help sir. Very much appreciated.
Vanjul.
DELL-Ravi Ch
9 Technologist
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7.1K Posts
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February 3rd, 2015 03:00
Hi Vanjul,
The LCD BIST test shows that LCD screen is good and the display on the external display confirms that the system board is good. So it seems like the cable connected between LCD screen and system board or the port on the system board.
Harv2189
3 Posts
0
February 4th, 2015 17:00
I have about the same problem with my old Inspiron XPS, this only shows up when the laptop is cold(<70f). About rebooting a couple of times it comes up like it should or if I move to a warmer place it starts.