I have the monitor all hooked up correctly and when i look at it it looks black, when i shine light into it i can just barly see my desktop i played with the brightness of the screen but it didn't do anything to the monitor what can i do?
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It's mostly likely a bad capacitor in the main power supply of your monitor. If you're brave enough to dismantle it, look for capacitors that're "crowned", and sometimes even rupture from overheating in such circumstances. You can order replacements from Digi-Key if you can figure out which might be your problem, but I'm not sure I recommend you try this unless you have at least SOME soldering/desoldering skills or a friend who does. You COULD wind up worse off. It's up to you, only YOU know your personal skill level for such tasks. And do I need to say, UNPLUG it before dismantiling? :)
if you can hooked up with other monitor just to ensure if the problem is only with in the monitor. after you replaced with other monitor then the display is clear or good picture, that was mean the only problem is the monitor. if the upper portion is black screen or the picture not so clear the cause is busted screen back light. to see the back light you will need to remove the back cover of the monitor. then the back light is a thin cold cathode flourescent tube, it was covered with a metal shield cover protection attached at the upper portion of the screen panel display.
Does the fault appear on the laptop screen aswell? It appears by your description that the fault is only on the external monitor. If the screen comes on for a moment and then goes blank as described, then this appears to be an invertor fault. It is very common among laptop and tft screens and requires the invertor inside the panel to be replaced / repaired. Simply plug the screen into another computer to confirm.
Most likely your backlight is out, one way to tell is if you shine a light at the screen you should see whatever is hooked up to the monitor. Another issue could be the LCD inverter which supplies the power to the backlight.
try shining a torch/flash light on the screen If, when the flashlight is on the monitor, the problem is fixed then you have aback light issue. You will have to contact your manufacture or shop you bought it from
It appears as if the monitor's back lighting is failing. To test the theory, take a bright flashlight and shine it on the lcd monitor screen when it goes black. If you can see the images that were on the screen before it went dark while shining the flashlight on the screen, then the back lighting is failing. Depending on the monitor, it could have florescent or L.E.D. back lighting, but it's usually more economical to simply replace the monitor with a new better performing monitor, than to attempt repairing the back lighting on the failing monitor.
sounds like you might have a back lighting issue? take a flash light and shine it on the monitor when it is black and look to see if the image is there but not lit up, if this is the case then you might need to change the light balist in the monitor of even the back lights themselfs..
if the picture is fuzzy for a long period of time then you have a controler card issue there is a controler card in the monitor that changes the image coming in from HDMI, VGA, DVI into the binary that the vertical and horizontal drivers use to show you the image onthe screen... hope this info helps. good luck