When i insert the powercord into my compaq (presario 2800) laptop.the bright ness will reduce,if i plug out the power cord again the bright ness will increse,what is the solution for this problem?
Have you tried to increase the brightness while it's plugged in. Use
the fn (function) ket plus the key that corresponds to increasing the
LCD brightness.
usually it's the other way around. When plugged in the LCD brightness
will increase and decrease when unplugged to save battery power!
Its not a problem, its how it was designed. With the power cord in it will be at full power so it will light brighter, When the power cord is out, it will be less bright as its using power from the battery , it will light dimmer to conserve power.
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