How To Check For Bad Ram Slot

  1. How To Check For Bad Ram Slot Machines
  2. How To Check For Bad Ram Slots

To check the new RAM wasn't defective, I tried it in slot 1, a known good slot. All 4 sticks of RAM worked in slot 1, so the RAM wasn't faulty. All 4 sticks work in every slot except slot 2 (the first black RAM slot). If I put any stick in slot 2 - old or new - the PC is dead, it won't even boot to the BIOS. Boot computer, and it's now running much faster. However, it shows in System Information that there is only 4GB of RAM recognized, and Bank 1 slot shows as empty.-I switch the RAM sticks between Bank 1 and Bank 0, computer boots just fine but still shows Bank 1 slot empty.-Put old RAM sticks in. Bank 1 slot shows as empty. Check the motherboard vendor for updated BIOS with RAM compaibiliy fixes. Several operating systems allow the user to pass in a list of 'bad' memory ranges to prevent the operating system to use or allocate memory in that range. See Blacklisting RAM Pages for more details. You can test this in one of two ways: either run software that checks the RAM or physically open the computer and switch out the RAM. The ideal method would be to open the computer and take out one stick of RAM at a time and see if the problems go away. If you have two sticks, for example, take out one and restart the computer. 1) Ok you get the ram and you try each stick in the apparent dead slot. The sticks are tested and known to be good. 2) If it still appears dead, boot the PC with a stick in the good slot and clear your CMOS, enter bios and 'load default Values' and reboot. Power down, remove the ram stick and try point 1) again.

Is it possible to fix laptop memory slot failure with a guitar pick? Yes, it is. You will not fix the memory slot itself, but you can work around the problem. 🙂
Today I received a Toshiba Satellite Pro 4600 laptop with the following complaint:

The laptop starts and works properly, but recognizes only one of the two memory modules installed. The laptop has two 256MB RAM modules installed, but registers only 256MB.

First of all, I removed the memory cover to find out if both memory modules are installed correctly. The laptop had two 256MB Kingston modules installed and they were seated properly.

When I started the laptop and entered the BIOS setup menu, I found that only one of the two memory modules is detected and the laptop registers only 256MB (262144KB) of RAM instead of 512MB (524288KB).
Just a side note. In the computer world 1MB=1024KB. That’s why 256MB=262144KB and 512MB=524288KB.

I tried reseating both memory modules but it didn’t help.
After that I tried installing both memory modules in both memory slots one by one and here’s what I found. The laptop worked absolutely fine when both memory modules were installed into the slot A, but failed to boot with both memory modules installed into the slot B.
Apparently, there is nothing wrong with the memory modules and the laptop has a faulty memory slot B. The memory slot is permanently soldered on the motherboard. If one of the slots fails you’ll have to replace the whole motherboard or use the laptop with only one working slot.
Buying a new motherboard for this older laptop wouldn’t make any sense because it’s too expensive, but the laptop is still in a good working condition except the faulty memory slot B, so I continued playing with that trying to find the solution.

I noticed that the laptop start normally with the memory module installed into the faulty slot if I slightly press on the module with my thumb. And this gave me an idea.

This guitar pick is going to fix my laptop. 🙂

I installed both RAM modules back into the slots and then placed the guitar pick over the module in the slot B as it shown on the picture.

I thought if I close the RAM door it will press on the guitar pick/memory module and it will have the same effect as pressing on the module with my thumb. And it worked!

Both memory modules were detected properly and the laptop registered all 512MB. After “the fix” I tested memory with Memtest86+ and the laptop passed the test.
I wouldn’t call it the best solution for fixing a faulty memory slot but in some cases it will work.

By the way, I didn’t charge the customer for this “repair”, he knows what is going on and how I “fixed” his problem.

If your computer is unstable and crashing a lot, tech guys will suggest you to do a RAM test. But what exactly is RAM and how to test it? RAM is the memory of your computer. RAM stands for Random Access Memory and it is required for programs to run in your computer.

If your RAM goes bad, you may receive various bad memory errors or your computer may behave erratic. Before we talk about how to do a RAM test, let us look at some of the symptoms that may indicate a bad memory situation. But even before that, let us show you how RAM memory chips really look! Here we go:

Symptoms of Bad Memory that will ask for RAM Testing

  • Video playing is not smooth. When you play a video it plays with a jerky motion.
  • Unwanted lines and black areas appear on your screen every now and then.
  • Your computer will stop working and freeze for quite some time which may range from a few seconds to a few minutes.
  • Computer restarts on its own. You’re doing some work and all of a sudden you see that your computer has restarted. This may indicate a memory fault.
  • Your data files get corrupted.
  • Blue Screen of Death: In computer lingo, this phrase is used for a blue screen that suddenly appears and after that your system gets crashed. The screen shows a lot of white text which makes no sense to most of the lay people.

Blue Screen of Death

These are only some of the indicators pointing towards memory issues. The above mentioned symptoms could also exist because of other problems but more often than not they entail memory problems and thus require a RAM test. Bad RAM is one of the most annoying problems in computers as it is difficult to ascertain whether a symptom is really being caused due to unreliable RAM chips. RAM testing tools help you find out faults in memory. If these tools find that memory is all fine, then you can focus on other possible causes of unstable computer.

RAM testing is not difficult at all. If you’re facing any of the above mentioned problems, you should do a RAM test while trying to identify problem.


How do RAM Testing Tools Work?

RAM testing tools essentially check the integrity of memory by writing data into the memory and then read it back. If the data read during the test is same as was written, then the memory is deemed to be in good shape. A bad RAM memory chip will have some difference between data written into it and data read from the same locations.

Test RAM with Windows Memory Diagnostic Tool

Your Windows operating system comes with a built-in utility for diagnosing memory issues. It’s called Windows Memory Diagnostics.

  • Open Control Panel (press Windows key and R > Run box will appear > type ncpa.cpl and hit enter)
  • Go to All Control Panel Items and then open Administrative Tools
  • Double click on Windows Memory Diagnostic
  • A box will appear with the following options
    • Restart now and check for problems (recommended)
    • Check for problems the next time I restart my computer
  • You can select either of the two options as you like
  • When Windows will restart, it will run memory tests and show you the final results. Testing may take several minutes to finish. You can go and grab a coffee in the meantime. Windows will not require your input during the test.

The above screen shows that RAM is all fine and there were no problems found. However, if memory chips fail any of the tests, Windows will show you details results. An example of failed test screen is shown below:

Failures shown by Windows memory diagnostic during RAM test.

If Windows Memory Diagnostic Tool shows any failed tests, you can be sure that the RAM in your computer is not working fine. You may need to change at least one of the chips.

When Windows is running tests, it gives you options to select tests that you want to run. To get the options, you can press F1 key as the tests are running. Then you will be able to select test groups named:

  1. Basic
  2. Standard
  3. Extended

For most people basic tests are fine. So, you don’t need to do anything. Just sit back and wait for Windows to finish testing.

When Windows will finish testing, it will reboot the computer. You’ll login and as the desktop will appear Windows will show you results of the RAM test performed during the restart process.

How To Check For Bad Ram Slot Machines

If Windows does not show you the results (for whatever reasons, best known to Microsoft), you can go and check the results yourself.

Finding RAM Test Results from Windows Memory Diagnostic

  • Press Windows key and R to open Run dialog box
  • Type eventvwr.msc in the Run box and hit enter
  • Event Viewer will open up
  • Go to Windows Logs > System
  • This will show you all the logged events pertaining to the Windows system.
  • System Log may to quite big for manually finding something in it. Thankfully, there a Find option to filter the log.
  • Click on Find… and then type MemoryDiagnostic in the find box. This will search the log and find the logged information from the memory test that you had just run.

Testing RAM with MemTest86

How To Check For Bad Ram Slots

Windows Memory Diagnostic will be sufficient in most cases. But if you want a more advanced tool that gives you more options for running a RAM test, you can use MemTest86. This software has been developed by PassMark and it is available for free. MemTest86 has a compilation of 13 RAM testing algorithms and therefore it may find faults that Windows Memory Diagnostic may fail to locate.

Main menu screen of MemTest86.

  1. MemTest86 boots from USB pen drive or CD drive. So, would need to create a bootable pen drive or CD and put it in to your computer. Then boot your computer from the appropriate drive.
  2. This software supports DDR2, DDR3 and DDR4 as well.
  3. It also support 64-bit Windows.
  4. There is support for error-correcting code RAM.
  5. Running MemTest86 is safe as the code is signed by Microsoft.

We hope that this tutorial was helpful for you to learn how to run RAM tests. Should you have any questions, please feel free to ask in the comments area. We will try our best to assist you. Thank you for using TechWelkin!