4GB Memory Upgrade for Acer Aspire 5102WLMi


I have bought a 4GB memory upgrade (2x 2GB PC2-5300 SODIMM) for my Acer Aspire 5102WLMi (Aspire 5100 Series) laptop, I installed the two memory modules correctly however with 4GB installed the laptop refuses to POST. I have tried the following:

  • Tried both 2GB SODIMMs without the other (Worked Fine)
  • Tried the original 512MB SODIMMs (Worked Fine)
  • Tried with original 512MB SODIMM and new 2GB SODIMM (Worked Fine)
  • Tried swapping over the 2GB SODIMs (Didn't Boot)
  • Left the computer for 10 minutes with both 2GB SODIMMs installed (Didn't Boot)
  • Checked latest BIOS installed (No Change)

The Crucial website said that the laptop supported 4GB of RAM as do several other sites through found through Google, up until now I was fairly confident this would work.

Couple of questions that would be good to have answered:

  1. Question: Has anyone got an Acer Aspire 5100 Series running with 4GB RAM?
    Answer: Yes, I have now got one working with 3.75GB Usable, the rest is occupied utilized by the Graphics Card.
  2. Question: Any tips on getting this to work; is there a CMOS reset switch?
    Answer: Yes there is, if both SODIMMs are removed two very small interlocking PCB tracks are revealed. If these are shorted together with a screwdriver the BIOS will be reset.


Best Answer

The solution in the end was to reset the BIOS, there is a small jumper located beneath the SODIMM slots labelled J2. After removing the battery, I shorted this with a screwdriver; after putting the laptop back together it booted up with a warning the the CMOS memory was invalid. Set the BIOS up again as per my preferences and now I have my 5102WLMi working with 4GB of RAM.

Acer Aspire 5102WLMI with 4GB DDR 2 RAM

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