Sometimes my screen flickers, but until today the problem only occurredwhen the laptop was running on battery power - at that time I had afriend who is excellent with computers look at it and he said that theproblem didn't seem to be with the monitor itself (although it wasstill possible) but he suspected the battery sometimes didn't have thejuice to support it all the time...but now (today) the screen has begundimming while plugged in
FN+^/v arrows does nothing and the power options haven't changed
DELL INSPIRON 640m -> updates all installed & running XP Pro
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Re: Screen Dims ... ALOT
Try connecting an external monitor to the laptop. You may have to select the video output to display on the external monitor by holding down the blue <FN> key and pressing the blue CRT/LCD (located on one of the <F> keys, like F8,F9, etc..). If the problem occurs on the external monitor with the battery or AC power, then you have a problem with either the video card or motherboard in the laptop. If the problem does not happen using the external monitor then you laptop’s LCD display is going bad. Your responses are intended to improve the level of service provided. Please show your appreciation by rating your experience. Thank You.
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Please connect the laptop to an external monitor. If no flickering on
monitor screen, from my previous experience, this is more likely loose
connection of video cable connected to the LCD. So talk to Acer support
again and require the replacement of LCD.
It really sounds like you have a short in the ac adapter. Laptops dim the backlight on the screen when on battery power and go full brightness when on AC. I think your adapter is going on and off. When it is on the screen is on full and when it goes off the screen dims down a bit. You could have a bad adapter, most likely, or a bad charging jack in your laptop. Check the adapter first, just use a multimeter set to voltage. Read lead goes to the center pin and black lead goes to the outside metal contact, you should get a reading of 18 to about 26 volts. Move the wire around near the plug that you are holding and keep checking the readout. I think you will find the voltage dropping as you move the wire.
When it first switches over to battery, you will generally see a flicker. The dimness is normal. Most laptops are configured to display the LCD screen when on battery power to allow longer operation on battery power. This can be overridden in the Control Panel -> Power Options but doing so will reduce the amount of time you will be able to work on battery power. The time before it enters sleep mode is generally shorter as well for the same reasons.
Hi there yes its the graphic drivers that needs installing, i must also tell you that when you remove AC power from the laptop it will go into power saving mode and you will notice that the screen dims a little, this is normal and nothing to worry about
This is possibly, a loose cable or the screens inverter board is overheating. the inverter is similar to a booster in a flourescant light fitting. which converts power from DC To AC and boosts up the panels Light Tube. CFL if it,s faulty or overheating. this will cause the panel to dim.
also check the plunger at the underside of the screen, isn,t sticking down. designed to cut off the panel when the lid is closed. Finally some model laptops, only boost the brightness running on A/C Power. the battery would run-out fast with screen at full brightness. if theres an fn key on the keyboard, press fn and the brightness button to adjust screen brightness.