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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A computer monitor has a front-mounted LED that displays its current status and flashes in the event of an error. When an error occurs, the flashing may be accompanied by an error message on the screen. If the screen does not display an error message, the problem most likely falls into one of four common categories.
Unsupported Display Mode A video card has the ability to send output to the monitor at many display resolutions and refresh rates. However, no single monitor is capable of supporting every possible display mode. When the video card sends an unsupported display mode to the monitor, the monitor shuts off to prevent damage and blinks, or displays an error message. Standby Mode b> When a monitor detects no video signal from the computer, it assumes that you have turned the computer off and enters standby mode to reduce power consumption. Dell and HP monitors display an amber light when in standby mode. The status light on an Apple monitor blinks slowly. Incorrect Power Supply Some monitors such as certain Apple Cinema and Studio displays use external power adapters. Because different power adapters may have similar connectors, these monitors are designed to detect when an incorrect power supply is connected and blink the status LED rather than attempting to turn on. In the case of an Apple display, the LED blinks in an alternating short and long pattern. b> Backlight Failure b> A flat panel LCD display has an LED or fluorescent backlight that illuminates the pixels and makes it possible to see the contents of the screen. If the backlight fails and requires replacement, the monitor is unable to display any information. In some cases, you may be able to resolve this issue by turning the monitor and computer off, disconnecting and reseating all cables. If the monitor still has a backlight issue, it requires professional service.
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.
The 5 blinks can indicate a picture tube starting to fail. Carefully open up the back and look for the flyback transformer. It will be the part with the large red wire coming out the top that goes to the side of the picture tube. There should be 2 controls on the flyback, screen and focus. Turn the screen control slightly clockwise. If the set stays on, the picture tube is starting to fail and you have bought yourself time to find a replacement. If that fails, then you will need to investigate other possibilities that will involve soldering. Let me know if you need to do that.
The 6 blinks indicate no horiszontal. This can be as simple as a couple of bad capacitors or the "jungle" IC. If you can solder, please post another question with the model and a brief description indicating that you can work in the set and we'll continue to track this down.