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Okay, I have a Dell Inspiron B120 (model# PP21L). The laptop worked fine just a few weeks ago and only needed to have the LCD replaced. I replaced the LCD and now the laptop won't turn on. When I hit the power button, I get two or three green lights (depending on whether the batt is in) for about three seconds and then it shuts off. I have disconnected all the peripherals, memory, HDD, keyboard, LCD, but to no avail. It still just shuts right off. I'm thinking power supply, but it just doesn't make sense why it was working fine and now it doesn't. The computer has been sitting on a shelf for about three weeks while I got the money together to get the new screen, so I can't figure out what happend between then and now. It doesn't even give me any error beeps when all peripherals are disconnected. I'm usually pretty good with this kinda stuff, but this one has me stumped. Any help beyond what I have already tried would be greatly appreciated.

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Posted on Dec 29, 2010

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driver or hardware problem if it is happening when using the web cam and mic then thats a good place to start update the divers for them and see if it takes care of the problem

Posted on Jan 28, 2011

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Have you disassembled the notebook & checked the inverter board & LCD screen for any burnt cables or electronic components?
You can also try some of the diagnostic tests outlined in this article:
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Please feel free to let me know in case you have any further questions.

Posted on Feb 05, 2011

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Posted on Feb 25, 2011

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SOURCE: Okay, I have a Dell Inspiron B120 (model# PP21L).

Is it successfully completing the POST (Power On Self Test) ? No "beep" implies that the POST has failed.

Did it work immediately after you replaced the LCD?

Did you (accidentally) damage the motherboard when you disassembled it, to replace the LCD?

Can you try a diffferent CPU?

Posted on Mar 17, 2011

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Okay, I have a Dell Inspiron B120 (model# PP21L). The laptop worked fine just a few weeks ago and only needed to have the LCD replaced. I replaced the LCD and now the laptop won't turn on. When I hit the...


Is it successfully completing the POST (Power On Self Test) ? No "beep" implies that the POST has failed.

Did it work immediately after you replaced the LCD?

Did you (accidentally) damage the motherboard when you disassembled it, to replace the LCD?

Can you try a diffferent CPU?

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Hi,
please go to www.support.dell.com
and then select the home segment and then "drivers and downloads".

Then select the option to choose by the model number and then select the model number of you inspiron laptop to download the related driver for the audio or microphone.

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