Dell :: Inspiron 1545 LED Screen No Back Light?

Apr 24, 2010

Recently I broke the screen on my laptop and I have purchased and received a replacement Dell Inspiron 15.6" Matte 1600x900 LED screen from an internet retailer.

The problem is that when I connected it to the laptop first time it did not work, I figured out there was a loose connection for my flex cable (my bad), then I made the connection firm and I got my new screen working perfectly! I got happy and screwed back the screen. Before assembling everything back, just tried it again and damn - the picture became very-very dark. I mean, no colorful details on the screen - I do see a picture but it is shades of dark grey - i can hardly see something there but again, the picture is there. I don't know much about LED screens but I would say it looks like there is no "backlight" or something like that.

Note, when I switch to the external monitor - everything is fine. First I thought the culprit is the flexible LED cable that goes from the motherboard to the LED screen. I just thought that maybe I broke the cable or its connection when I was disconnecting/connecting my LED screen. I figured out the cable part number (R267J) and ordered a new one from Dell. Once it arrived, I tried it - the same problem . So right now I definitely know the following:

1. The replacement LED screen must be good cause I saw it working and it is actually showing something, just there is a lack of brightness or "backlight"

2. The LED flex cable is good (I have the old and new one - they work the same)

3. The external LCD monitor connected via VGA works well - so it looks like the video controller is OK

Guys, what should I try next?

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