Is my CPU burned and how to repair it

Discussion in 'Computing and Networks' started by ArakelTheDragon, Jul 17, 2017.

  1. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    I have Acer Aspire E1-510, when I start it, the lights go on, but the display does not, when I plug a cable to an external monitor nothing happens. Since the graphics are in the display, I believe the CPU is burned and the whole motherboard should be replaced since the CPU is soldered to the motherboard. Here is a picture of the CPU, what do you think?


    Edit: The USBs are charging my phone when I connect it.
     
    Last edited: Jul 17, 2017
  2. AlbertHall

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    Jun 4, 2014
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    It sounds like it could equally be the graphics circuitry.
    Do you hear any error beeps?
    When you power it up, do you hear the hard drive working (like it might be booting up)?
    Does the processor get warm?
     
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  3. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    The graphics card is in the processor, its Intel HD.

    No beep sounds.

    The hard drive and RAM are removed, but that shouldnt stop the computer from loading the main screen and bios options.

    I dont know about this.
     
  4. AlbertHall

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    The graphics needs a RAM buffer so there will probably no graphics if there is no RAM. Stick some RAM in it and see what happens.
     
  5. ArakelTheDragon

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    Nov 18, 2016
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    Doesn't works with RAM and hard drive. I made a mistake, only the power light gets turned on, the other lights don't work (battery, hard disk, internet).
     
    Last edited: Jul 17, 2017
  6. AlbertHall

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    If the processor stays cool then it might be the power control circuit (though that might be detecting a problem anyway, including the processor).
     
  7. bertus

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  8. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    No, its not the same laptop, the laptop in the other thread is Asus X55VD. I am wondering which one of them to repair and which one to sell.
     
  9. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    How can I find out for certan? I have a multimer and I know how to use it. I also have a screwdriver with a cable attached to it, to check is there a connection between 2 points on the PCB.

    If the power circuit is the problem, why does the battery get charged and why does the fan spin? Only the Lightbulb LED is on, the rest dont work at all.
     
  10. AlbertHall

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    It is pretty much impossible to find motherboard faults with a multimeter.
     
  11. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    Why is that so? If there is no power or the power is reduced, I should find it without a problem by checking the voltage? And if it is impossible, what do you think the problem is from these symptoms:

    Only the "lightbulb" led is on, the rest are not working, the fan is working, the display does not start at all, by connecting the laptop to another display there is no difference, the picture of the processor shows something like a heated plastic on one side, is that ok?
     
  12. ArakelTheDragon

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    Nov 18, 2016
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  13. AlbertHall

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    The supplies are very well protected and fairly 'intelligent'. Let's suppose you measure no power. How do you tell whether the supply is faulty or if it has detected a problem and shut down or even not started up in the first place.
    It is possible to do this sort of thing but you need to know, in detail, what protections are in place and how the power up sequence works.

    I used to work for a company which did component level repairs on Apple laptops and desktops using only multimeter and 'scope. This depended on having a large number of boards and discovering, by intelligent guesswork, which components to change given certain symptoms. This method worked for about 90% of the boards, the remaining 10% being junked.
     
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  14. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    Ok, I understand. Any ideas on whats wrong with mine, only the power light works, the battery, hard disk, internet do not work?
     
  15. AlbertHall

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    Does the CPU get warm or stay cool?
     
  16. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    How can I check that? The CPU is in the other side of the motherboard.
     
  17. tom_s

    Member

    Jun 27, 2014
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    if it has, check the onboard cmos battery, have had some new pc's that refused to start because of a near dead cmos battery

    i'm assuming you've done power down? removed laptop battery and left unplugged for a while?
     
  18. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    I will check the battery, I havent tried unpluging it. I just got it from the previous owner
     
  19. AlbertHall

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    Definitely worth removing all power for, say, 10 minutes to do a full reset.
     
  20. ArakelTheDragon

    Thread Starter Member

    Nov 18, 2016
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    1. Removing the battery does not work.
    2. I believe the processor does not get heated, despite that I am not certain since I removed the thermal pad and now there is an air gap.
    3. On the pictures I show which usb and light are working and checked the capacitor there - its charged to 3V.
    4. This thing does not have a battery, you can see the white speace where there is suppose to be a battery, but there isnt one on both sides (no socket for a battery). Check the pictures for more information.
     
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