Issue with computer after an electrical storm.

Posted on 2006-04-15
Last Modified: 2010-04-25
There was a thunder storm the other day and I heard some popping and found it was coming from the surge protector my computer was plugged into. So I then unplugged it from the wall. Now when I try to start the computer the light comes on, the fan starts, and I can open the cd drives. It does not make the normal start up noises and I do not see anything on the monitor. When I click the monitor it sounds like it gets power. What things can I look at on my computer?
Question by:ablondeau
    LVL 32

    Expert Comment

    First check the capacitors on the motherboard for any splitting or leakage.
    If everything looks ok then I would suggest replacing the power supply as this would be the first piece of hardware that would get the surge.

    Author Comment

    The capacitors look good. Do you think that the power supply is just partially working, since the computer is starting some functions? I do not have a power supply handy. Is there anything else I can check, while I wait to receive a power supply?
    LVL 32

    Expert Comment

    Are you getting at least one beep from the computer when it starts up? Or are there no beeps at all. If there are no beeps then I would suspect the power supply first and then the motherboard.

    Expert Comment

    A bad PS can put out some voltage so it that could be why some things work.
    If you're not getting POST then I don't know what else to check.
    LVL 26

    Accepted Solution

    Thunerstorm damage can affect selected parts or every single part in the system.
    What gets hurt is very ramdom.
    It's even possible for the monitor to get fried without the system being damaged.
    Unfortunatly it's common for the entire system to be ruined.

    You have actually have 3 or 4 paths in.
    The power of course, plus the wires to any modem and/or network card you may have.
    Also through the monitor's cable.

    Before you do anything else I would replace the power supply.
    Given your surge protectors reaction the PSU certainly took a hit.
    People think of power supplies as one power supply. In reality they are several power supplies in one housing and one or two or three can get fried without the other's being affected. This is why you may seem some activity and still have a bad PSU. For example, the drives may be getting good power but not the motherboard. The thing is your system needs all of them to be working in order to function so one bad output is a bad power supply.

    Once you have a good power supply remove the modem and/or network card and see if it will boot.
    Take note of any beep codes if you hear any and let us know what you found.


    LVL 2

    Expert Comment

    make sure power is not connected. you could try unplugging all the unnecessary things like Drives(Harddrive,CD drives, floppy drive), modem and network card. reseat the memory and or CPU and or Videocard if separate. take out the cmos battery....wait about 1/2 a min and put it back in. Then try to boot the system to see if you at least get the POST.
    LVL 3

    Expert Comment

    I agree with PCBONEZ and pcchecks but wanted to see the end result so I am posting this to get an email and keep up with progress. Just to add a contructive comment. I would first look at the PSU then processor, then systemboard. In that order. I've seen this type of issue many times.
    LVL 5

    Expert Comment

    All The times i have seen a thunderstorm affect a PC the motherboard had to be changed.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    Maximize Your Threat Intelligence Reporting

    Reporting is one of the most important and least talked about aspects of a world-class threat intelligence program. Here’s how to do it right.

    Suggested Solutions

    Title # Comments Views Activity
    Windows 7 shutdown 36 65
    pc wont power on 28 64
    Window Login & Logout, Active Directory 7 89
    A Computer Pen For PC For MS Lync 5 55
    Skype is a P2P (Peer to Peer) instant messaging and VOIP (Voice over IP) service – as well as a whole lot more.
    It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.
    Internet Business Fax to Email Made Easy - With eFax Corporate (, you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

    737 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    18 Experts available now in Live!

    Get 1:1 Help Now