Lcd comes on initially and then shuts down. External monitor works fine. I bought a used LCD and same thing. I bought from someone reputable. Any ideas?
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Attach an external monitor. Does the external come on? May have to use the FN key + F8 to toggle it between the LCD and the attached monitor.
When you say that the laptop LCD glows a little bit, this makes me think the back light of the LCD has gone bad. If it displays fine on the external, then it is a pretty good chance the LCD back light has failed. If you can attach an external monitor and see something on it, run the built hardware test. This is done from a powered down state. Then press the FN key + Power, this places it into the diagnostic. Follow the on screen instructions. If it comes back with an error code, write this down and compare it to this list at Dell website. http://support.dell.com/support/topics/global.aspx/support/dsn/document?c=us&l=en&s=gen&docid=14B3819735D6B40EE0401E0A55177ED2
Occasionally, reseating the LCD video cable to the mother board will have a positive effect. Here is a link to the online service manual that explains how to reset it. In the diagram it is labeled #5 It is located under the keyboard.
please try it without the lcd i mean use your note book without the external lcd, am sure your system has a processor and or processor fan problems try lose the computer and blow it, i mean the cooling fan of the processor, if no avail, then you will need a new motherboard for your system, but am pretty sure its the processor that is fulty, thanlks
Fn + F8 will toggle the VGA port on the back if the System, Press a 2nd time, External and LCD, press again, LCD only again. (Wait about 15 to 20 seconds for the external port to initialize after pressing Fn+F8 as it has to detect the projector)
They aren't hard to replace. If you can find one on eBay, get it and use the on-line manuals from Dell's web site. They are very clear and easy to follow.
The back lighting for the LCD panel has gone out. The picture is there,
you just can't see it without the backlighting. So, it could be
the Inverter that supplies power to the back lights or it could be the
CCFT lamps that burned out. In either case your local computer repair
shop should be able to fix it. If it is still under warranty take it
back to where you bought it and they should have it repaired under
warranty.
Sorry to be the one to tell you what you already know. You do have an LCD problem as you suspected. Hooking to an external monitor pretty much ruled out anything else. The good news is that there are a bazillion lattitudes out there, some do not work so, a cheap Lcd should be easy to come by. Technicaly it is not hard to swap LCD. Acquire replacement LCD and cerefully install it. OR troubleshoot existing LCD to component level and repair the defect. Or get a new laptop..
I have seen this problem before, after booting to the external monitor go into the display settings and try setting the resolution to 1024 X 768 and the color settng to 16 bit or preferably 32 bit. If you can do this, then shut down the laptop remove the external monitor and try booting on the LCD display. BPCS
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