Motherboard

A motherboard failure on a laptop that is out of warranty would usually mean that… it’s time for a new laptop. The price of a new motherboard is usually higher than the current value of the laptop.

Symptoms:

Plug in the power adaptor and try to start the laptop.

  • Nothing happens.
  • The “ON” light comes on, the fan spins, but nothing on the screen (black) and you can’t hear the HD working after 10-15 sec.
  • The “ON” light comes on, the fan spins, but after a few seconds the light goes off.
  • After pressing the “ON” button the screen stays black and you can hear a quiet high-pitched sound coming from the laptop.

Troubleshooting:

Look for the “lid closed” switch and try pushing it a few times. It’s usually a small switch near the hinges that is pressed when the lid(the screen) is closed. Sometimes these switches get stuck in the “lid closed” position that results in black screen(no backlight) or non-starting laptop. Also some laptops have a magnetic switch (newer Dell’s and most Apple’s), that doesn’t get stuck.

Test the laptop with another power adaptor. Although not common, the adaptor can fail and not supply the needed voltage even if it has a green “power on” light that lights up when you plug it in. Even if you measure the output voltage and it’s OK, the adaptor may have failed and wouldn’t supply that voltage under load (typically 3.5A to 6A). You can use an universal adaptor or go to an independent repair shop and ask them to check it (some shops will try to charge you for “estimate” for doing just that, so ask in advance).

Reset the RAM. See the article on RAM failures for instructions.

Remove the hard drive and the CD/DVD if it’s easily removable.

Finally try to start the laptop again with only the power adaptor plugged in and with the RAM reset and all removable components and the battery out. If there’s still nothing on the screen, you will need to bring it to a repair shop.

160 Comments

  • #160 by ELI November 19, 2014 at: 2:14 pm

    Hi guys I have a lenovo g575 the problem is that when I press the power button the power button light came on and the fan spins for about ten seconds and then the power button light turns off. There is no screen output either , the screen is black. Is there anyone could help me pleaze

  • #159 by mark belfort November 17, 2014 at: 12:16 am

    headphone and speaker working at the same time…

    DELL:VASTRO 1550

  • #158 by Terrylane November 4, 2014 at: 1:15 pm

    Hi guys..im on Lenovo g505. it turned of to Install updates without my permission. it went on again but this time it quickly turned off without completing the updates. when I switch it on..the fan is not spinning. no display but battery and charger lights are on..im a student and I need it plz help me.

    thanks

  • #157 by edwin November 3, 2014 at: 6:37 am

    Hello everybody my friend bring laptop to me to repaired it but the problem is when i try to power on the power indicator lights on but immediately off. And the fun on the motherboard not spinning or moving. A laptop is dell latitude. Please help me.

  • #156 by snyper October 28, 2014 at: 5:00 am

    I have Acer aspire E1-531 it can’t charge again,I have tried it with so many adapters but still refuses to charge please help out what can I do about dis

  • #155 by Vincent October 27, 2014 at: 12:59 am

    Hello,

    I have a Medion MD96970 Laptop and the problem i have with it now is that the sceen refuse to come up. The power button light is on, the fan is working, but the screen remain black. I’ve tried all the tricks of removing the battery and the memory but still remain the same. Pls help?

  • #154 by Vincent October 27, 2014 at: 12:55 am

    Hello,

    I have a Medion MD96970 Laptop and the problem i have with it now is that the sceen refuse to come up. The power button light is on, the spining, but the screen remain black. I’ve tried all the tricks of removing the battery and the memory but still remain the same. Pls help?

  • #153 by Femi October 19, 2014 at: 8:12 am

    My Dell Ispiron 3521 is giving problem coming up. When I press the on button, the fan comes up and some other indicators and it do gives a tick sound but won’t come up. What might be the issue pls…

  • #152 by moses Ay October 12, 2014 at: 3:38 am

    try a known good charger. and reseat your battery .

  • #151 by moses Ay October 12, 2014 at: 2:44 am

    my acer aspire turns off immediately I turn it on , no booting ….I have change the mother bard to a working board but the second mother board now does the same , I have change the dc jack to a new one, still the same . please what can I do ……reflow has been done but no way ….and this is a working motherboard before in a bad case.