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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Connect your laptop to an external monitor and switch to monitor. If the external monitor shows the desktop, then the complaint is in the lcd/led display unit means the screen. Replace the screen. If the external monitor also shows the complaint, then it is normally due the mch(media controller hub) . It comes as separate card unit in some models and onboard for some other models.Only an experienced technician can solve that issue. In some rare cases it is due to a corrupted BIOS. Reply if this helped you.
Well the problem will determine the cost. Try to connect an external monitor to the laptop. If the external monitor displays a normal screen then it's the LCD and the cost of replacing the LCD will average about 175.00 but if the external monitor also has the same problem as the LCD on the laptop then it's a much bigger problem, and the problem is the video chip on the motherboard. You will have to replace the motherboard. But the price that I quoted may be different in your area.
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.
there is a configuration of each one of the three plans of energy, and there you can change the time the screen is on when plugged or unplugged, the brightnes, and some stuff more like the wireless. you have to go to "energy option", or something like that... mine is in spanish. and then under each option is the configuration. good luck!!
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.