How I fixed memory slot failure

posted in: Hardware, Laptop hacks | 63

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.



 

Two memory modules

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.

256MB memory detected

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.

press on memory module

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.

guitar pick

This guitar pick is going to fix my laptop. :)

install guitar pick

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.

close memory door

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!

512MB memory detected

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.



63 Responses

  1. Gauthier

    It works ! I upgraded my old “CLEVO D870P SYSTEM” to 2 GO of RAM instead of 1 thanks to you. The “grabs” of the slot (little parts of metal which are supposed to block the RAM) were really badly made, but I managed to block my 2 ram upgrades with this kind of plastic.
    Thank you very much.

  2. cj2600

    @ F.Gomes,

    Maybe you are installing too much memory?
    Let’s say your laptop can support 1GB RAM max and you are installing two 1GB RAM modules. In this case the laptop will see only 1GB installed.

  3. F. Gomes

    i have the problem with slots both are working separeted but wen the are togheter only one can be read and a dont know why any ideia whats is goin on here thanks

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