3 Simplest DIY Computer Repairs Anyone Can Do

Guy McDowell 03-11-2009

You must understand that what I am about to reveal to you puts me in mortal danger. Men in black and white fuel-efficient vehicles may show up at my door and threaten me with terminating screwdrivers. Those are the easy ones to spot. It’s the independent contractor that you never see coming. They could be dressed, or look like, any sort of geek there is. What I’m about to reveal to you is their bread and butter. They’ve kept you in ignorance about how easy it is to do some of the things they do. Let’s keep it between us.


The first thing you need to know is basic troubleshooting Windows Troubleshooting for Dummies Windows takes a lot of crap for problems outside of its control. Learn about the biggest issues people incorrectly pin on Windows and how to actually troubleshoot them. Read More . Start with the most obvious and work your way backwards. Read and understand the error messages How To Solve Any Windows Problem with Event ID For every Windows crash there's a way to lick the problem without dialling assistance. Read More on your screen. They are in plain language – don’t get intimidated. If it says No Video Source Present, check the cord between your computer and monitor. If the power light isn’t on, check the power cable. Many of your problems are likely of this nature. If you have already done all of the troubleshooting steps and are sure what hardware component is causing problems, then we can talk about that now.

Replacing or Re-seating RAM

There was a time when this was a major operation, requiring a soldering iron and steady hands. Now, RAM comes in easy to install and remove sticks and is a very simple DIY computer repair. Keep in mind for this, that static electricity is your enemy and grounding out is your friend. You can get a grounding wrist strap, or you can touch the metal chassis of your computer frequently. I’d recommend the wrist-strap just to be safe.

diy computer repair

Open up the case of your computer. Many cases today don’t even require removing screws so that’s easy. Look inside for a few seconds at your computer. Seems really confusing and high-tech, doesn’t it? Don’t be intimidated. Look for rows of long computer chips that stick out of the board, perpendicular. They’re about an inch high.

diy computer repair


If you suspect that they just need to be reseated, gently push on the center-edge of the RAM, then the top and bottom. If there was any movement, then that was probably the problem. Once you are sure all of the RAM is seated, you can try to restart your computer.

If the RAM is still causing a problem, you can remove it very easily. At either end of the RAM, there are little levers – or retaining tabs. Gently push these levers down, both at the same time. The levers should pop back and the RAM will be raised up. Using only the edges of the RAM, take it out and put it on a non-static surface. If you’re lucky you’ll have an anti-static bag around. They’re usually pink, silver or clear with thick black lines on them. You can usually get these from a computer repair place, just by asking for them. Tell them you want to bring in your bad RAM for a replacement. Hey, it’s an easy sell for them.

home computer repairs

Take the RAM to your local computer store and they’ll help you select the appropriate RAM for your computer.  Make sure you know what model of motherboard you have, since this is an ideal time to upgrade your RAM for a faster computer.


Replacing the Power Supply

If you’re certain the issue is your power supply, that’s easy to remove and install too! WARNING: Unplug your computer completely. Let it sit for a few minutes. This ensures that there is no power to the computer so you don’t get shocked. Letting it sit for a few minutes allows any capacitors to discharge so they don’t shock you either.

home computer repairs

Once you feel safe to proceed with this DIY computer repair, take some masking tape and a pen and mark all the connections that your power supply makes to your components. Do that on the component side of the connection. This helps you to know what cables need to plug back in when you get the new power supply. Sometimes a ribbon cable can have a few connectors on it that aren’t used. No sense connecting to those. Disconnect the power supply cables from the components.

Now, on the back of your computer you will see a number of screws around the power supply. Unscrew those and save the screws. Hey, little screws can come in handy someday. The power supply should now slide right out of the back of the computer or inwards into the computer. Don’t force it. If anything is blocking it, carefully remove those things.


Voila! The power supply is in your hands. Take it, and your motherboard information, to your computer store. Now you can get an appropriately sized power supply. They may recommend a more powerful supply and if your motherboard is meant for it, it can be worth a few extra bucks to upsize. This can help the components run closer to their maximum capacity, meaning a faster computer for you. To install the power supply, read the manual that came with it and make all the connections accordingly. Often, these connections are now unique to each component, making it harder to mess up.

Replacing or Reseating a Video/Sound/Network Interface Card

If you are certain that the video or sound or NIC card is causing your problems, those are probably the easiest things to replace. When you open your computer, you’ll see a column of cards inserted horizontally. These are the cards we’re talking about. If you think they might just need to be reseated, do the same technique you used for the RAM. Gently push on the center edge of the card, then the left and right. Again, if there is any movement, this may likely be the problem.

home computer repairs

If you are certain the card needs to be replaced, it is usually a matter of removing one screw from the mounting flange of the card and gently pulling the card out by its edges. Pop it into a static-free bag and take it into the computer shop. Once again, this may be the time to upgrade as well. Usually by the time you’ve had a computer long enough for a component to fail, a better component comes along and costs about the same as the original one. Sometimes it costs even less.


Take the card and gently insert it into the proper slot. Put the retaining screw in and proceed with the User Manual for the card to make sure it has the right drivers installed and the right configuration.

Yes, these instructions sound too easy to be true, and you’re right! These are the basics that apply to almost any make and model of the components we’ve talked about. There will be specific little variations for each new part, however those should all be covered in the user manual that comes with them. Keep all of your original packaging for the new parts as well, just in case they too are faulty. Then you can return them easier.

I hope this article has helped you to overcome any fear of the computer that you might have. Or at least saved you a few bucks in labour costs for repair. All this information comes with no warranty. If you try to repair your own computer and it doesn’t work, or gets worse, I can not accept any responsibility for that.  Always research until your are completely comfortable with the work you will do.

If you’re familiar with any other tip that can be added to above list of DIY computer repairs, please share them in comments below.

Related topics: Computer Maintenance, Tech Support.

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  1. Helen Dangote
    December 5, 2009 at 12:34 pm

    This is a great post. It shows one of the best ways to get computers fixed. What I like about this article is how you've used images to illustrate the steps at any one point.

    Great post, keep it up :)

    • Guy McDowell
      December 5, 2009 at 9:10 pm

      Thank you. I'm retiring from writing for a little bit.

  2. Jawahar
    December 5, 2009 at 12:52 am

    Thanks......Good Explanation....

  3. douglas cumminggs
    November 7, 2009 at 6:46 pm

    love this site. only found out about it 3 days ago

  4. Rick Stanley
    November 7, 2009 at 11:55 am

    First of all, any time that you work on the inside of a computer box, you should unplug ALL of the cables in the back, front, side, top, etc...

    Grounding strap:

    Once that is done and you are using a grounding strap, WHY would you then connect the strap to the frame of the box, that itself is NOT grounded?!

    PLEASE connect the grounding strap to an EARTH GROUND, such as a properly grounded metal water pipe, a properly grounded electrical outlet box, radiator, etc... (Test first and/or check with a licensed electrician, licensed plumber, etc...)

    RAM, PCI Cards, etc...

    If you suspect a RAM or other card not making proper connection, pull the card, then clean the contacts first either with alcohol, or a commercial electrical contact cleaner, BEFORE reinserting the card back in place. Please make sure the card is completely dry BEFORE reinserting! DO NOT spray any cleaner onto the Motherboard, power supply, or any other internal part. Avoid the use of stronger solvents.


    Use a can of compressed air to BLOW out any dust inside the computer. DO NOT use a vacuum cleaner, as some may generate static electricity.

    IANAL, however: Whenever you work on the internals of your computer yourself, YOU accept ALL risks for any problems, or damage that may occur as a result. My advise above carries NO WARRANTIES WHATSOEVER, explicit or implied!!!

  5. Karthikeyan
    November 7, 2009 at 10:15 am

    Thanks very much for this useful article.

    Could also be great if published like an article for DIY maitenance tips for Laptops!!

  6. Steve
    November 3, 2009 at 8:49 pm

    Personally, I HATE changing out power supplies - it's not that it's hard; it's just a tedious procedure, especially if you are trying to keep airflow in mind or have a couple of hard drives.

  7. Albert
    November 3, 2009 at 7:48 pm

    Great article Guy! I can't even count the number of "broken" computers I have fixed for friends and family by simply pushing the VGA cable back onto the connector and tightening the screws so that it doesn't wiggle itself out again!

    • Guy McDowell
      November 3, 2009 at 8:02 pm

      Thanks. I had a college prof who told a story of a support call he took once. The client was 200Km away. He asked the client to check the cable under his desk. The client simply refused to believe that was the problem. He had to drive 400Km total to spend 2 minutes plugging in that cable. The cost probably could have bought the client several new computers.

      • Tim
        November 4, 2009 at 1:03 am

        Something similar happened to me, but it wasn't a client but a big box store! My mother's dog chewed on her laptop cord, there was smoke later, so they brought it "in." The tech plugged it in WITH THE OLD CORD, got no response, and said he could send it away to be repaired but that it would be cheaper to get a new laptop! I came over, tried plugging it in with a different cord, and everything's fine (except for needing a new cord)!

        I've also had to do the whole "on-site, nothing but a reboot needed" thing before. Annoying, but always funny later, right?