I turned my system on to standby and there was a brief blink (a greyish screen) and then when i came back out of standby the backlight was gone. could still see desktop, but barely. tried re-installing drivers and fixing them. this happened last week too but somehow it just started working again. any help would be great inspiron 1720 - or uninspiron as im going to coin it
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Please check if you see the shadow in BIOS. To go to BIOS, restart your system and start tapping the F2 keys. If you see the shadow in BIOS, then you can contact Dell to get your LCD replaced if your system is still under warranty .
I would need to know what operating system you are running because Vista has a setting for the display brightness when running on batteries. I would suspect that, that setting is turned down to conserve battery power. If this is not the case, then the battery may be too weak to put out the correct voltage requirements for the display. If you have Vista, go to the control panel > power options > In the left pane, look for the display brightness > here you can change the brightness for running on battery and for AC power.
First try holding down the insert key while booting. Next either your F1 or F2 key will get you into bios. Try pressing those keys alternately while booting to enter setup. If you get to bios follow the previous poster's advice. Try re seating the ram boards and the hard drive. Make sure you don't have any usb flash drives installed.