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Laptop screen will not come on

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I have a Toshiba Satellite Lapton running Windows XP. It is a couple of years old. About two weeks ago the power supply died...I purchased a new power supply and now the screen will not come on. All of the lights (power, wireless, battery, etc.) come on and I can hear the computer actually booting up but the screen never comes on. I have tried rebooting, taking the battery out, and a few other things but nothing seems to work. One would think that it was the LCD but everything worked fine until the power supply gave out...and now with a new power supply the screen doesn't work. Could the power supply be preventing the screen to come on? The power supply that I purchased was one that was compatible with my laptop.
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Welcome to G2G

I realise you said that the new power supply is compatible but have you actually checked the power ratings stated on it to that of your old supply (i.e voltage, power output etc)?

Assuming the new power supply is ok, then it's possible that when the old one died, it spiked one of the components in the screen. Just to eliminate the possibility of the problem being with some other component in the laptop (e.g video card), are you able to connect the laptop to an external monitor? At least if that works then you know the rest of the laptop is fine.

One last thing - this is highly unlikely I know but it is possible that the screen controls (i.e brightness/contrast etc) have simply got turned right down?
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