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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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  • Christopher Warnick Mar 17, 2011

    It is not completing the post. No, it did not work immediately after replacing the LCD. I didn't even touch the mother board when replacing the screen, other than the cable ends for the LCD inverter. I do not have another CPU to put in it's place. I just dont get how it worked a few weeks ago and now it magically does not. There is no sound of any fan or HDD start up when the power button is pushed. I just get the green lights for 3 seconds and then nadda.



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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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