My Acer 4920 Aspire, a great machine normally. Monitor has begun fading every so often and can be solved by taking out the AC lead then replacing it. It is then okay for a while then happens again. Could be a power problem but very frustrating
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There is no sure fire way to fix your graphics card in the laptop, usually they are soldered chips on the board, but if it still works currently, your best bet would be to take an air compressor or a can of compressed air and blow the dust out thru the side vents (NOT THE BOTTOM, as air flows in from underneath you would just be making it worse) chances are its overheating and causing the issue
From your description, you may either have a bad cable to the LCD on your laptop or the LCD screen itself is going bad. I would guess a repair shop may charge $100-200 for the parts and labor, but you'll have to check your local area for price estimates.
Since your computer is nearly 3 years old, you may want to consider purchasing a new computer, especially since they start at $300-500 brand new.
Try attaching an external monitor to the laptop & see if you could get any display on it. If this is successful, then you might have either a faulty LCD cable or screen inverter board. The
LCD cable transfers data signal from the motherboard & video card
to the LCD screen. It also supplies high voltage DC power to the screen
inverter board. The screen inverter board works as a power supply for
the backlight lamp mounted inside the LCD screen. It converts low
voltage DC power to high voltage AC power needed for the backlight lamp.
Try reseating the video cable/connector.
Also connect an external monitor to the external video port, power up the monitor first then boot up the laptop. The video image should automatically divert to the monitor, if you see a normal video image then the video card is OK and the problem most likely the LCD screen.
this sounds like a transistor issue concerning the ccfl lamps the power transistors are deteriorating and they will eventually go bad you can have them replaced and that should fix the issue. otherwise I would say have the capacitors that feed the ccfl's may be getting old and need replacement as well, its not something the average customer will want to do but if you have a service center that does electronic repair then that would be bst. Hope this helps