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Acer V5-552g (power?) problem

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    #1

    Acer V5-552g (power?) problem

    Hello everyone.

    I would like to ask you guys for some help about the problem I have with my Acer V5-552g laptop. It's the laptop I bought second hand and it looks like it is defective or not fully functional at best.

    The problem is, laptop only works when on battery and with it's bottom plastic lid of the casing unscrewed and removed. When the lid is on and screwed the laptop presents a rather strange behaviour, from not wanting to turn off to very extremely slow and unresponsive.

    When the laptop is on AC power charger things get even weirder, is either does not want to power on again, or it presents a HDD disk read error (CRTL+ALT+DEL to restart) upon booting past the splash Acer screen. When it's on battery only it boots fine most of the times.

    I did all the usual stuff of checking and changing the BIOS battery, clearing CMOS, 30 sec power drain, new HDD, cleaned and rescrewed the MBO, thermal paste redoing, various versions of MS Wins installed...

    What I am thinking the problem might be is some power converter chip which has problems converting the 19V power from the AC charger to some other voltage (like the 5V HDD uses), but still somehow manages to convert the 15V power the battery gives corretly thus allowing it to boot properly.

    Why the bottom plastic lid screwing on and unscrewing has such an impact of the laptop working (not working when the lid is on, working fine when the lid is off), is a complete myster to me.

    Any help is welcome, I thank you in advance.
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    #2
    Re: Acer V5-552g (power?) problem

    I think you're going to have fun with that one Thermaltake, where do you even start ??? I had a recent job with a Asus laptop that when the case was screw down tightly laptop wouldnt boot but as in your case when case was loosened/Removed it booted fine, in my case it was the area around the powerjack that seemed to be causing the trouble. I carried out a visual inspection on the board with a scope and discovered a hairline fracture just at the back of the power jack, i would put it down to a design fault as the connector was right at the edge of the board with little support, luckily due to its placement the only part of the board effected was the power jack area, I cut the tracks to prevent arcing and jumpered to a non effected area, reinforced the jack with a small amount of Epoxy and all worked fine. You seem to have a hell of a lot of issues with your board but it might be worth checking for damage as mentioned, sometimes a visual inspection may turn up a fracture or a faulty component and save a lot of testing into the bargain

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      #3
      Re: Acer V5-552g (power?) problem

      heh yeah I know, thats why I asked if maybe someone have some similar problems on this laptop or this board.

      I found few things on board that are mabye causing the problem. I will take pictures while disassembling and attach them later.

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        #4
        Re: Acer V5-552g (power?) problem

        I just can't find any problem on motherboard or grounding. I noticed when laptop is powered On without charger plugged in laptop is booting in OS normally, but when I connect AC adapter and power it On HDD disk read error (CRTL+ALT+DEL to restart).

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          #5
          Re: Acer V5-552g (power?) problem

          Got the new power cable still didn't help.

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