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.

140 Comments

  • #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

  • #137 by balaji March 17, 2014 at: 1:05 am

    hi i have goverment laptop.when i press power button that time fan is on and all processor running but screen doesnot display after 2 min off my system .again on my system now problem cleared..why did my display on after 2 min …pls help me

  • #136 by keerthi February 20, 2014 at: 5:28 am

    My lap is hcl. Firstly my lap show a blue screen then after a days lap shows booting missing .after a days lap does not on.what problem my lap have .please replied to my question please replied

  • #135 by keerthi February 20, 2014 at: 5:23 am

    My lap is hcl..firstly my lap show a blue screen then after two days show booting missing after a days the lap does not on…what problem plz reply for my question.

  • #134 by cc10 December 19, 2013 at: 8:30 am

    Black screen problem i have removed everything that can be removal, i also put the thermal paste and tested the fan, nothing… just the same light on fan on (for a few seconds) and blackscreen. So i just forgot the computer for a couple of days… and magically started working again… worked for 2days really normal, but today have the same black screen problem! Any suggestions for this malfunction?

  • #133 by anuwar fyzal shah November 8, 2013 at: 5:36 pm

    hello my problem is dell laptop when click the power bottom nothing on the screen, fan is spaining, signal led is on, adepter is good and come to head proccesor please guide me thank you very much.

  • #132 by Bob November 6, 2013 at: 4:10 am

    I have HCL me Laptop . My laptop hard disk not detect . my hdd is ok . plz solve my problem

  • #131 by michael obi September 23, 2013 at: 9:25 am

    My name is michael obi I have this problem with my laptop HP6735s initially if I try putting it on it will show the power indicator followed by the spinning of the fan then blank screen no display atall before it will mange to show but if I put the laptop off and on later again it will take time before it displays something on the screen but presently it only shows the power lights and followed by the spinning of the fan then nothing on the screen