Dell Inspiron Display is dim even when connected to AC power.

One of our employees has a Dell Inspiron 1200 laptop.  The display screen is dim even when connected to AC power.  When he connects it to an external monitor, the display on the external monitor is the correct brightness.  
chaos506Asked:
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jamietonerCommented:
Sounds like either a bad backlight, bad inverter or bad dimmer switch. Is the system under warranty?
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a24hrpcCommented:
You can try adjusting the brightness. On most laptops its your Function button + Arrow up. It may be different on your laptop though. I found an image that shows it as either the left or right arrows as well. just look for these symbols on your keyboard and use with the function key
acer-laptop-adjust-screen-bright.png
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a24hrpcCommented:
Another thought. I don't have my laptop in front of me but I believe you can adjust Display brightness in power settings and or display options from the control panel.
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a24hrpcCommented:
How were you able to very those parts were bad so quickly?
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chaos506Author Commented:
I really don't know that yet.  I'm not going to be able to get my hands on it until Wed.  I may revisit this when I do.  I just wanted to close the discusion until  I have the machine in my posesson and can see what's going on with my own eyes.  
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a24hrpcCommented:
just seems unfair to give someone credit before you find the solution is all.
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chaos506Author Commented:
I apologies.  I am relativly inexperienced in this forum.  It was not my intention to offend anyone or deprive anyone of due credit for anything.  I'm just another overworked computer lackey that was trying to temporarily trying to close the discussiion until I can give more attention.  
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chaos506Author Commented:
jamietoner:
It was a bad backlight.  Fortunately I had an identical laptop that I was able to canabilize for the entire disply.  I swapped it out and all is well.
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jamietonerCommented:
Glad to hear you got it fixed.
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a24hrpcCommented:
Which part was bad?
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