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Thread: PC POSTing only 50% of the time.

  1. #1
    Join Date
    Nov 2008

    PC POSTing only 50% of the time.

    Hello everyone,

    I've recently been having problems with my laptop, where everytime I turn it on, it only POSTs sometimes (yes, post, not boot). When it does POST, everything works 100% perfect stable no problem etc. When it doesn't post, all I get is a black screen (not even turned on), the fan turns and the LEDs turn on, but that is it. No HDD activity, no Booting, no Windows etc. NOTHING.

    The problem has gotten worst and the PC practically never POSTs now. It being out of waranty, I oppenened it up and removed almost every non-vital part of it, took the occasion to dust the motherboard etc.

    Right now, the PC is only basically only a motherboard attached to the screen. I'm turning it on with a screw driver:
    -CPU (AMD TURION 64 X2 TL-50)
    -NO HDD
    -NO Keyboard
    -NO CD drive, Network adapter, USB adapter
    -Memory: With & Without (see below)

    As of right now, the PC posts with an almost perfect 50% ratio. What's even weirder, is that it alternates, turns on, doesn't, turns on, doesn't etc.

    I can even garantee that it is not a memory problem either, as even without memory, the PC POSTs 50% of the time (But I of course get a BIOS error)

    Does anybody have a clue what is going on? I'm willing to try somthing more drastic like taking out the motherboard, cleaning the CPU pins and stuff, but I don't really think that would help, especially since the comp is stable when it does run.

    What could be causing a computer to POST 50% of the time, especially with such a 1:1 ratio? Any thoughts? I'll take any suggestions or ideas.

    PS. My BIOS is up to date.
    PS. Laptop is HP Pavilion dv2003ea

  2. #2
    Join Date
    Apr 2008

    Re: PC POSTing only 50% of the time.

    See this thread :
    Hope tis helps .

  3. #3
    Join Date
    Apr 2008

    Re: PC POSTing only 50% of the time.

    Before you do anything, i'd do a visual inspection of where you bent the pins to check for any black/charred areas. Also, look around for capacitors that are "oozing" or bluging more than normal.

    You most likely created a short somewhere, and any one of the three components could be fried. I'd normally say exchange in a different PSU to make sure it wasn't fried, but if you have the short still on the board, poof.. there goes that PSU as well.

    If you can test the CPU in a different board, that'd eliminate that.

    If you've got a junker PSU, see what happens at your own risk, OR, you could test it with a multimiter.

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