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.

147 Comments

  • #147 by javier July 26, 2014 at: 5:18 pm

    toshiba l955-s5330 power ligt ligts orange 5 times and then goes off

  • #146 by Bibek kunwar June 19, 2014 at: 8:26 am

    I have toshiba sattellite C660-1QD.yesterday i have used it for half hours and hibernate it as usual.when i press power button today light comes for 10 sec and it goes..power supply is working as it shows charging light..Fan is also not spinning.

  • #145 by gmot June 18, 2014 at: 7:22 am

    I have a toshiba satellite laptop,the cpu was working fine yesterday, now when i turn it back on, it starts to boot, but then goes to “windows error recovery” there’s two options : 1 launch startup repair :2 start windows normally. When i launch startup repair nothing but a black screen and the mouse pointer. When i start windows normally it just repeat the same procedure all over.I try the hold the power but thing after taking out the battery and plugs etc. ports all cleared, no cd in drive….

    Toshiba Satellite
    Intel core 2 duo processor T5550
    3072 mb pc5300 ddr2 sdram
    250 gb
    802.11
    Your help would be Appreciated

  • #144 by sifiso June 17, 2014 at: 1:54 pm

    My laptop doesn’t want to start up it just shows the indicator light and does not want to go on,what seems to be the problem????

  • #143 by oladayo June 12, 2014 at: 5:12 am

    my system name is advent 7113 it on but it those not display on the screen but the fan are working and the indicators are also working pleas what is the problem

  • #142 by Vinayak May 29, 2014 at: 11:38 pm

    i have a 3 year old vaio vpceh3aen laptop…the problem is that when i pressing the display back side and some time without pressing it make loud internal sound….
    (display works perfectly but it makes internal hardware sound)
    plzz solve my problem…!

  • #141 by Elangovan May 26, 2014 at: 10:14 pm

    I have hasee notebook but it will not startup . How I can set utility for my laptop and install software?

  • #140 by Wisdom April 14, 2014 at: 3:54 am

    i have a RV510 laptop, when i put it on power, the power light indicating charging keeps on flashing on and off..it takes a lot of time for the battery to gain enough power to turn on…however when i manage to turn it on the its stops charging totally….whats the problem pliz help

  • #139 by Mukesh March 30, 2014 at: 4:45 am

    my laptop is dell 1525 inspiron this is hanging with long countinuous sound when i m playing movie?

  • #138 by Compaq March 25, 2014 at: 11:45 pm

    HP Compaq Presario CQ61 Doesn’t turn on at all.

    My 3 years & 9 months old HP Compaq Presario CQ61 was working perfectly, however, when I turn it on, but it freezed by the first screen (black active screen with a hyphen on the top left corner of the screen).
    It didn’t react to any buttons, not even the power button, so I plugged it off from the charger (Since the battery is dead and it cannot hold power even for a second).
    After that I plugged it in, the LED near the charger port lit for 20-30 seconds, then the light goes off.
    I tried many ways I removed the battery and charger back, didn’t work either.

    Any advice / support will be greatly appreciated.
    Thanks in advance