Question about Toshiba Satellite A105 Notebook

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Toshiba a105-s101 memory install boot issue

Hello, my notebook had two 256MB memory modules installed. I purchashed 1GB and upgraded one slot(for a total of 1.25 GB..everything was fine. Today I bought another 1GB, but when I installed that..the computer would not boot..the power would come on but it immediately powered off and on 5 times before completely shutting down.

What is strange is that neither 1GB module will boot by itself in either slot unless the other slot has the old 256mb of ram installed. So I know both 1GB units are working. I just want my 2GB ram! lol...Anyone ever heard of this?

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  • travbedaman Dec 28, 2007

    Thanks, it does support 2GB though..even the Toshiba website specs say so. Either 1GB stick works with the 256MB stick (for a total of 1.25GB).

  • DelCity Dec 30, 2007

    I am having the same problem. I bought 2 gig of Crucial memory for my Satellite A105. When both 1 gig modules are installed, the computer power light blinks on and off repeatedly, but never boots up. But either of the 1 gig modules, installed with one of the original 256k modules works fine. The computer specs say that the memory is expandable to 2 gig. Toshiba tech support pages do not address this problem. I called tech support, but they wanted to charge me $35 since i'm out of warranty.

    I thought it might be a problem with Crucial memory, but then I saw another forum where someone reported the same problem with their Toshiba satellite laptop when they tried to install 2 gig of PNY memory.

  • matthew scaman Jan 01, 2008

    having the same probelm upgraded to 2 gb and blink 5 times and shuts off i even went out and got a 512mb one to see if i could get 1.5gb but same probelm any solituion would be much appecaited i did reAD ON THE WEBSITE THAT THE COMPUTER CAN HOLD 2GB in a slot so maybe i should go try a 2 gb card but all the site remember and sell only 512 and 1 gb cards for this computer

  • ApolloMan Jan 04, 2008

    I have a A105-S2061 and just purchased 2 sticks of 1 gig from Crucial. The computer came with a 256m stick in slot 0 and I had installed a 512m stick in slot 1. Works fine. Will not boot in any combination of the 4 sticks unless the original 256m is in slot 0. Currently the 256m and a 1gig stick are installed, Windows reports 981meg installed. I'm not a math whiz but when I went to school 1024+256 did not equal 981. I'm glad I'm not the only one, I though I was losing my mind.

  • tsansan Feb 02, 2008

    I have the same problem... original ram was 256MB, bought another 256MB at time of laptop purchase about two years ago. Recently, bought 2-1G Kingston RAM. Both of them work as long as the original 256mb module is inserted in slot. Can anyone solve this problem?

  • Anonymous Jan 07, 2009

    Same problem here, trying to use 2x1gb but wont boot, 1x1gb won't boot either. The original 512mb + 1gb = 981mb.
    My 1gb's are 666mhz, which I think might be the problem.

  • Dr Forbin May 10, 2009

    Hi all,

    I agree with the individual who posted solution #3.

    Solution #3
    posted on Sep 24, 2008

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    Did u guys used PC
    4200 memory sticks? Cuz i think the problem here is all about
    frequency, since when u use the original memory together with the new
    one the system gets the memory frequency down to keep up with the
    original one.. wich is 533 or PC4200. You guys must be using ddr2 667
    Pc 5300 memorys..

    I bought 2 Kingston 1 GB DDR-2 533 sticks today and the BIOS is now reading 1177776 KB instead of 960 MB. Happy with at least the 1 GB + for now. Canot boot with both new sticks installed. Using 1 GB and a 256 MB. Not finding PC4200 anywhere locally.

    Here is BELARC Advisor's reading -- Belarc "sees" each stick at full value.



    Windows XP Home Edition
    Service Pack 2 (build 2600)

    TOSHIBA Satellite A105
    System Serial Number: 16183233Q
    Enclosure Type:


    Main Circuit Board

    1.60 gigahertz Intel Celeron
    64 kilobyte primary memory cache
    1024 kilobyte secondary memory

    Board: ATI SB450
    Bus Clock: 100 megahertz
    BIOS: Phoenix Technologies LTD 2.30


    Memory Modules

    59.75 Gigabytes
    Usable Hard Drive Capacity
    41.79 Gigabytes Hard Drive Free

    CD-ROM Drive

    HTS541060G9SA00 [Hard drive] (60.01 GB) -- drive 0

    1152 Megabytes Installed

    Slot 'M1' has 1024 MB
    Slot 'M2' has 256 MB

    Local Drive


    c: (NTFS on drive 0)
    59.75 GB
    41.79 GB free

  • hidoy May 11, 2010

    Solution link . . .



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The RAM must be PC4200 Kingston KTT SODIMMs or it won't work. I currently have 2x2GB in my A105-S2001 and all it does is not read a little over one GB.

Posted on Feb 18, 2011

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Hi hidoy,

Ref: Toshiba a105-s101 boot up --- Am convinced that memory speed is the problem. I must use 2 PC-4200 sticks or live with the mixed memory presently installed. Board is incapable of down-clocking higher speed ram as a substitute.

Posted on May 31, 2009


Did u guys used PC 4200 memory sticks? Cuz i think the problem here is all about frequency, since when u use the original memory together with the new one the system gets the memory frequency down to keep up with the original one.. wich is 533 or PC4200. You guys must be using ddr2 667 Pc 5300 memorys..

Posted on Sep 24, 2008

Same issue: tried the PNY PC2-5300 1GB modules and they will not boot individually, only while another stick is present (in this case, the original 256 Samsung)

Posted on Sep 13, 2008

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Matt67, I really think you must have got lucky because I tried pny in my toshiba a105-s101 and no luck. so i thought i would try it with the better kingston memory and still no luck. this is obviously a issue with these model toshiba's but no one has the answer. I have the latest bios and there is no way of getting into the bios when the pc is not even booting up.

Posted on Aug 26, 2008

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Same ere man. i bought the valueram for my laptop. exactly same problem :( darn toshiba junk!

Posted on Jun 02, 2008

Hey guys same issue with the stupid laptop, i have tried samsung memory which is the same type that CAME WITH THE LAPTOP, and i have tried one other brand not pny or kingston (it is from office depot) and nothing works. same issue wether i put in two 512's or two 1gbs or a combo of both, and when i put in the 256 with the 1gb of same company ram it only shows 981 megs, not 1.25gb like it should. also i have updated the bios to 2.20 from toshiba and still no fix for ram issue.

Posted on Mar 31, 2008

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Okay guy i actually have the solution i had the same porbelm but now i have 2 gb or ram and my satellite rock now okay first the ram you bought is wrong and not compatible what you need is kingston ram with the same specs trust me i bought the centon stuff and call everywhere trying to get this to work i had toshiba sell me some kingston and rolled my eyes as i put it in but i powered it on and bam worked like a dream so if you want the 2gb you have to fork over the 29.99 each and you will be much happier

Posted on Jan 11, 2008

  • matthew scaman Sep 14, 2008

    if you guys buy a set of 1 gb sticks from kingston they will work but you have to go online and buy a exact pair as these are very picky i have done this to three satellites not all the same model but mine was the first one and is this model what i did was when to toshiba website and went to the upgrades avaliable it sent me to the kingston website i bought the 2 gb set which is 2 1gb sticks and now i have 1.87gb of ram this has nothing to do with bios kingston has a guarntee of compatibitly so if you bought kingston memory and it was right then you need to contact them as i have said two other people in my family have satellites not the same model but they had 2 gb limits and they now have two gb of ram all in all the kingston memory was 30 dollars a stick so a total of 60 dollars spent and this is the only way do get 2 gb out of these laptops it wasn't luck or some sort of magic just go to the website buy the memory from kingston that they say to making sure it is a set of two identical stick made together from the same batch and they will work no probelm


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Check your owners manual to see if the laptop will support 2GB of ram. If not you will need to use 2 512mb sticks to get to 1 GB

Posted on Dec 28, 2007

  • Jim Bruner
    Jim Bruner Dec 28, 2007

    Make sure the memory you are adding is of the same type as the memory that was orginally installed. Such as PC2100, etc, DDR or DDR2 and of the same frequency. If the new memory is of compatable type, but still does not work, contact the support section of Tosiba's website. BPCS


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