M4800 Owner's Thread

Discussion in 'Dell Latitude, Vostro, and Precision' started by changt34x, Oct 29, 2013.

  1. Yuuji

    Yuuji Newbie

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  2. Aaron44126

    Aaron44126 Notebook Prophet

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    It will work with any CPU that originally shipped in the M4800. If you are trying CPUs that are not on that list then it's a grab bag, you should check for stories from other users who have tried.
     
  3. unnoticed

    unnoticed Notebook Guru

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    I changed my cpu in my lvds motherboard for the 4940mx and its running better than ever.

    1.PNG


    Today this morning I finished replacing my lvds LP156WFC (TL) (B1) pcba bent for another lvds ips LP156WF4-SLC1 pcba flat
    http://www.panelook.com/LP156WF4-SLC1_LG Display_15.6_LCM_overview_18825.html
    This is the second best lvds ips screen you can buy that is using 40pin 6bit.
    The top one is an AUO B156HAN01.0 but impossible to get your hands on, and I don't feel like spending money on replacing the motherboard for a edp one.

    2.PNG


    Because the new panel is slimmer PCBA Flat, T≤3.2mm I had to order a new back panel because the mounting holes are different and antennas and hinges don't line up and the pcb bent screen mounts on a rail which don't exist on the slim panel.
    Mounted on the sides vs above and under.

    https://www.parts-people.com/index.php?action=item&id=19325
    https://www.parts-people.com/index.php?action=item&id=18960

    Hinges and antennas cannot be purchased what I can found so I had to buy a used assembly off ebay which I assembled yesterday.
    I have a new part coming along with new bottom panel but they are only parts not assembly so I had to get my hands on the hinges, antennas and cables set, the tubes that cover up the hinges between the middle tube.
    The only thing I don't have is the magnet because this is what makes the dell PN special as it is glued on to the left side on the slim pcb edp panels which obviusly mine did not have so nothing happens when I close the lid and the display stays on.
    But I have many of those magnets from other repairs and teardowns so no worry, in worst case I can pry off the old magnet from the left rail on the pcb bent panel and glue it in place.
    But I'm going to do this when the new back panel arrives, which is still in customs.
    I will not put on the new bezel, I will wait for the new part to arrive as mentioned above.
    I had some dust particles on the old screen and wanted to replace it but found no good pcb bent, those thick panels was all the same and the only way to get a better and even an ips panel was to go for a slim panel

    Edit
    Noticed just now that it is identified as an innolux, asked the seller about this, I'll be back
     
    Last edited: Nov 23, 2019
  4. Yuuji

    Yuuji Newbie

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    Thank you for the very detailled answer, would it be possible to mount the slimmer panel in a ghetto way into the old back panel, given the fact that it's 2mm thinner ?
    Because the backpanel that you linked is like one third of what I paid for the laptop, I just think that it "ruins the cheapness" of the laptop (if that make sense, again i'm french)
     
  5. John Carlson

    John Carlson Notebook Consultant

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    Last edited: Nov 27, 2019
  6. unnoticed

    unnoticed Notebook Guru

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    No, it could be done but it would require extensive modifications.
    Starting from the top to the bottom:
    The antenna circuit boards are printed over the area where you need to screw down the lcd panel and if you remove the boards on the left and right there is no nut and alignment pin underneath. So you would either have to risk damaging the antennas or cut off those tabs because they are in the way.
    The back panel itself is very deep to accommodate a thicker panel so you would need to glue on rubber feet to lift the slim lcd panel to the correct height otherwise the bezel is going to leave a deep gap when you put it back on.
    On the bottom the hinges are also different, on the thick lcd panel back panel it is rectangular and covers the bottom lcd tabs so you cannot secure the lcd panel even at the bottom, and it you unscrew the hinges there is nothing underneath the part that is covered by the hinge leaving you no place to secure the lcd at all.
    The slim pcb back panel has a slim rectangular hinge with a smaller L shape at each end left and right to give space for the tabs on the lcd panel to have a nut and alignment pin on the bottom to secure the lcd panel to.
    In the middle is a black plastic tube which houses both the tube that closes the gap between the bottom half of the computer and the back panel and the tubes on the hinges slides in to this middle tube when assembling the hinges.
    This is also higher up on the deep back panel and you will not be able to have the slim lcd panel resting flat against the rubber feet because it would sit proud of this area, yes you could probably cut off a lot of the magnesium parts that are in the way and grind down various parts but then you also need to be able to connect the lvds flex cable that on slim lcd panels are located down below the pcb board that is now placed all the way down on the tube.
    And you now have to make room for the flex cable to bend 180° after connecting it to the lcd panel and tuck it in behind the lcd still leaving the rest of the flex cable at the right location for it to reach the webcam that connects in the middle above the lcd panel if you have the webcam assembly on your panel which I have.
    This is no easy task and it took me two days to find a solution.
    I took a surgery scissor and cut open the seem on the sock because the adhesive is very strong then a sewing needle and small tweezers to open the the sock and expose the individual cables from the opening where it enters the back panel to the Y section where it splits to the webcam, and all the way to the J bend right behind the lvds connector.
    I cut it off just behind the connector and taped on a piece of automotive tape from TESA so that I would not put stress on the solder joints.
    Then I bundled the cables around in a loop not mashing it into the rubber feet on the left and carefully taped it into place then lifted the lcd panel into place and screwed it down.
    I wondered that it might cause interference because I removed the sock that might have acted as an isolation preventing electromagnetic interference but it was still fine, I tried to bend the cables and put a Neodymium magnet nearby but nothing happened..so I continued.
    Also the lcd panel I got has the lvds plug on the left instead of the right causing a bunch of cable to be left behind the lcd panel causing this issue because you need to have it flat, that's why I had to do what I did above.
    All edp screens have their plug on the left, or right if you look at the lcd perspective.
    Then you need to get a magnet glued into place for the screen to turn off when you close the lid, which I have not yet done because I am still waiting for the final parcel to arrive.

    So no it might be possible but its not practical by any means
     
    Last edited: Nov 30, 2019
  7. lewis marx

    lewis marx Notebook Enthusiast

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    hi all, new to this thread. i recently did a full system conversion on a cheap m4800 i got for 100 dollars. i replaced the amd gpu with a m2000m nvidia gpu, replaced the i5-4200m for an i7-4800mq, upgraded the ram to 20gb. i then replaced the motherboard, the display housing, and the lcd panel with a nice samsung ips edp panel and an edp motherboard. overall its a damn fast tiny machine. the only upgrade i want is a t1000 or t2000 gpu or maybe an m2200 gpu. but for now its damn fast, and the full system conversion to edp really isn't that bad total i only spent around 300 dollars and 150 of that was the graphics card.

    edit: clarifying, the cpu came from a dead machine i got cheaply from a goodwill computer works.
     
  8. Seyyed hasan

    Seyyed hasan Notebook Guru

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    Hi friends, I'm newbie here and sorry for my bad English.
    I bought a used m4800 with 4810mq and fireproof m5100 with windows 10.
    The laptop have Bluetooth light and it's off and I can't find Bluetooth driver in device manager , but when I go to dell support page and enter my service tag, it have driver for Bluetooth and when I install it nothing happened.
    Is there any way to find that the machine have Bluetooth device and how can I using it.
     
  9. Rippchen

    Rippchen Notebook Enthusiast

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    Check the BIOS that Bluetooth is generally enabled.
     
  10. Seyyed hasan

    Seyyed hasan Notebook Guru

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    But , in BIOS under wireless switch configuration , the Bluetooth is enable.
    This mean that I have Bluetooth device????
     
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