Bought a CF-51 for cheap... worth fixing?

Discussion in 'Panasonic' started by aaron7, Oct 27, 2010.

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  1. aaron7

    aaron7 Notebook Consultant

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    Just got a cf-51lcmddbm for $20 from the local electronic scrap place.

    I've installed 2gb RAM (one 2gb stick... won't see above 2gb I guess) and a new 80gb 7200rpm drive.

    It has a Pentium M 740 SL7SA 1.73GHz CPU in it. Not sure what revision laptop I have here but it must be early as this unit can't use a Core Duo like many CF-51's I've seen.

    It needs a new LCD due to being cracked.

    I'd like to know what I can upgrade the CPU to (the threads I've seen are all about the Dual Cores and up, not the older model).

    The LCD looks to be around $60 on ebay.

    Thoughts?
     
  2. Rob

    Rob Toughbook Aficionado

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    I just replaced a broken LCD on a 51 recently and the cheapest I found it for on ebay was about $250... Chances are that that $60 will NOT NOT NOT work... We had to buy 3 different screens before we got one that worked... and even that one had a line in it!!
     
  3. aaron7

    aaron7 Notebook Consultant

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  4. OperationDinnerOut

    OperationDinnerOut Notebook Consultant

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    Your model supports the Pentium M only. The 1.73GHz chip is a "Dothan" core (the second of two generations of Pentium M CPUs). See the following Wikipedia list of all Pentium M processors - you're interested only in the "Dothan, standard voltage" section:

    List of Intel Pentium M microprocessors - Wikipedia, the free encyclopedia

    The 2.0GHz Dothan is widely available on eBay for as low as $20 shipped (in the US). The only faster chips (and not by much) are:

    2.10 GHz: I wasn't able to find it on eBay
    2.13 GHz: minimum $37 shipped (eBay)
    2.26 GHz: minimum $91 shipped (eBay)

    It appears that the 2.0GHz chip was the fastest Pentium M that was commonly available, before they went to the Core Duo. The 2.0GHz chip is 270 MHz (13.3%) faster than your 1.73GHz chip. Personally, I don't know if that will make a noticeable difference in performance...

    I did this exact same upgrade to my IBM Thinkpad T43p a year or so ago. Unfortunately, I did not run any benchmarks, but I never felt it made much of a difference. I harvested the 2.0GHz chip from a Dell Latitude D610 with a bad motherboard, so I never really had to "pay" for the unit, besides the labor involved.

    I guess I'll end this with the obvious by saying it's really up to you, and how you feel about it. Some members here have a CF-51 service manual that can assist you when you open your laptop up.

    On an interesting note - I actually own the exact same model (CF-51LCMDDBM), which I purchased from an eBay seller who had a whole bunch and basically put them out for about $20 each, untested. The CF-51 is in the same semi-rugged category as the CF-73, but it's curious how there are so many more CF-51s than CF-73s available on eBay, or anywhere else I've looked.

    Best of luck, regardless.
     
  5. aaron7

    aaron7 Notebook Consultant

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    Do you know what revision this would be? MK1? MK2? How many were there?
     
  6. Alex

    Alex Super Moderator

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    Look is your bios screen for series
    In the bios version look at the first number
    If It says V1.xxxx its a mk1 ect
     
  7. adamwest436

    adamwest436 Notebook Evangelist

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    Haven't seen a 73 on there. We still have them in service.
     
  8. toughasnails

    toughasnails Toughbook Moderator Moderator

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    DESCRIPTION:
    Intel Pentium M 740 1.73GHz (Centrino), 15" XGA, 256MB, 40GB, 1 Gb Ethernet, Intel 802.11a+b+g, Combo drive, FDD, Win XP SP2 , No Drive


    You have a MK2LL. CF-51CMDDBM
    They made 7 different MK's
    MK1, 2 and 3
    MK1LL , MK1LL RoHS, MK2LL and MK3LL

    You can pick these 51's for $20.00-$30.00 shipped..... sending you a PM :D
     
  9. rusty503

    rusty503 Notebook Evangelist

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    Go to CPUID - System & hardware benchmark, monitoring, reporting and download CPU-Z. Install and run it. It will give you quite a bit of info about your system. Pay attention to the chipset listed under the motherboard tab. Once you see the chipset, you can do more research on the web to find out what CPUs are compatible with that chipset.
     
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