Having problems with your Dell Inspiron 9400 Notebook ?

Laptop inverter problem

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\015 My display turned dark although i could make out distinct images under torchlight. I replaced the inverter and now its working on ac power . as soon as i turn to battery power the display again goes blank as it was with the faulty inverter. also the laptop display brightness control function keys don't work and i cant change the screen brightnessplease help me i use a dell vostro 1500 laptop\015

Answers :

You have major problem here - the power regulator on the motherboard which regulates the line voltage down to 12V to feed the inverter, and battery voltage /up/ to 12V to do the same, is blown. I've seen this happen in HP laptops - line voltage to the inverter on mains power reads at 18.2-18.5V (which overloads the inverter), on battery it reads 10.5-11 (which won't fire the inverter). This is usually a sign of a bigger problem. Usually one that involves replacing the motherboard.
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