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    Repairing a Lenovo V560 Motherboard

    Discussion in 'Lenovo' started by GAMELASTER, Jul 14, 2015.

  1. GAMELASTER

    GAMELASTER Newbie

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    Hello,

    I have a broken Lenovo V560. Actually, the notebook dont responses to anything, only what event is, the charger is blinking. So that is mean is somewhere a "cut-off" (short curcuit) in power supply part.

    Well, i disassembled the notebook and connected a charger, well, two Transistors 4407A is so much hot. I little measuring and i get is there a INPUT voltage, but OUTPUT is nothing. I measured the temperature of 2nd CHIP (Q4), its got a 50Celsius... The first chip (by image) its just 46 Celsius(Q3)...
    [​IMG]

    Well, here in Slovakia i think on all repair shops is says "only motherboard replace". But i think is another way to fix it homemade. Im not a electric newbie so i will maybe take that..

    But, my question is, it is trouble only on that transistor or something other? Or, what u will be recommanding to try measure etc.. ? :)

    Thank u
     
    GAMELASTER, Jul 14, 2015
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    noteless likes this.
  2. GAMELASTER

    GAMELASTER Newbie

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    Well, main trouble is the 2 same battery chargers for Lenovo V560 ARE WRONG and he cannot powerup the PC. I just tested my charger from ASUS, and ASUS charger once reblink but then its lighniting and i can startup the computer. Well, computer boot up, all works great.. But, now is another trouble. The screen dont work. But not fully. Only brightness dont work, its little see the Windows, but not fully, so lighniting of notebook is wrong. I will dissassemble screen etc. to see a trouble. Then i send next post what i found. But anyway, any ideas where can be trouble? Thanks
     
    GAMELASTER, Jul 17, 2015
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  3. noteless

    noteless Notebook Consultant

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    I once had an issue with an acer c720 chromebook which I had dropped and the back light went out. I was able to make out some images and text that the screen was rendering if I angled it just right under good lighting conditions.

    I fiddled with some of the connectors but ultimately decided to replace the entire screen (then I sold that machine because the build quality scared me :confused:). I believe that the back light panel had broke and I didn't want to bother with taking apart the panel itself as thats a bit beyond my ability.

    Make sure the screen is indeed the problem and not some windows software issue. If the issue is occurring at boot/in bios then I suggest trying to replace the display panel if you can find it available.

    Best of luck getting that old machine into working order :)
     
    noteless, Jul 17, 2015
    #3