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Windows 7: Ram Issue

03 May 2015   #1

Ram Issue

I put some new ram cards in my laptop and my laptop now is not showing desktop icons properly(the little unknown icon) and the USB don't work. It is a Dell inspron 640m windows 7 home premium, I added 2 gb of ram

My System SpecsSystem Spec
03 May 2015   #2

Microsoft Community Contributor Award Recipient


For starters I'd remove the new RAM and see if things work again with the original RAM.

According to the Dell Owner's Manual (page 158) the 640m can support a minimum of 256MB and a maximum of 2GB RAM with two SODIMM slots. Each slot can use up to a 2GB RAM stick but not to exceed the 2GB maximum. It could cause issues. (Your system specs indicate the 640m is the computer you're using. Is that correct?)

Page 95 of the manual has some other suggestions for memory problems.
My System SpecsSystem Spec
04 May 2015   #3


I have 1 gb in each slot, there are two slots, 2 gb of ram.
My System SpecsSystem Spec

04 May 2015   #4

Microsoft Community Contributor Award Recipient


OK, that's good. In your original post you say you "added 2 gb of ram."

1. How much RAM was originally installed? Did it include either of the two 1 GB RAM sticks now installed?
2. Are the two 1 GB RAM stick a matched pair (same manufacturer, same specs?)
3. Have you tried to re-seat the RAM sticks to make sure they're properly seated? Tried swapping slots?
4. If the original RAM did not include either of the 1 GB sticks now installed, have you reinstalled the original RAM to see if the problems are corrected?
My System SpecsSystem Spec
05 May 2015   #5


1. 1 gb, 2 half gb sticks
2. yes
3. What do you mean
4. No
My System SpecsSystem Spec
07 May 2015   #6

Microsoft Community Contributor Award Recipient


I'm not the sharpest knife in the drawer. :) Just to make sure I'm understanding your situation:
1. The laptop originally had a total of 1GB RAM. Each slot contained a 512MB memory stick.
2. You replaced each of the 512M sticks with a 1GB stick for a total of 2GB RAM.

According to The owner's manual referenced in my post # 2, your computer should have one memory slot (called DIMM A) under the keyboard and a second memory slot (called DIMM B) located on the underside of the laptop. The instructions (starting on page 115) say in part:

NOTICE: If you need to install memory modules in two connectors, install a memory module in the connector labeled “DIMM A” before you install a module in the connector labeled “DIMM B.” Insert memory modules at a 45-degree angle to avoid damaging the connector.
If you followed these instructions it's possible that one of the memory modules didn't get seated properly and isn't making a good connection. Or it could be a defective module. So start from the beginning. Remove both of the 1GB modules. Insert one module in slot DIMM A only. Reinstall the keyboard and turn on the computer. If this 1GB module is installed correctly and is not a defective module, your computer should recognize it and function normally. You can check this by clicking the Start button, then right-clicking Computer, then clicking Properties. A new screen will open giving system info including how much memory is installed. It should show 1GB. If the module is not recognized by the computer it could be defective. Try the other 1GB module in slot DIMM A.

If the module in DIMM A is working properly go ahead and install the second module in DIMM B. Again, follow the instructions in the owner's manual. Hopefully you will have both modules (the full 2GB RAM) recognized. Or you will be able to isolate and tell if one of the modules is truly defective.
My System SpecsSystem Spec
07 May 2015   #7


Ok, also some of my icons don't show the correct poctures, it's unknown icon, and task Manger does not work.
My System SpecsSystem Spec

 Ram Issue

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