M4800 Owner's Thread

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

  1. Aaron44126

    Aaron44126 Notebook Prophet

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    You can visit "Services" (just search for that in the start menu) to locate and disable the service to prevent it from returning on startup.
    I do not think that it is a compatibility problem (we would surely be hearing more complaints about this). I think that your airplane mode switch is somehow broken and stuck in the "on" position.
     
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  2. John Carlson

    John Carlson Notebook Consultant

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    I had disabled that on Services before but it didn't help.
    People advise you to set it to 'Manual' instead of 'Disabled'.
    Mine was fixed when it was set to 'Manual'

    and when it was fixed, my airplane mode switched worked like normal. So it looks like Radio Management Services task piles up and cause bugs... and you have to manually end its tasks on task manager. Otherwise it will freeze your airplane mode switch. Regardless, I think Microsoft guys should give us a button that can permanently disable Airplane mode... not all laptops have perfect airplane mode switches or up-to-date system. This can screw up the whole laptop.

    Check this M6800 owner who had the same problem. Dell tech guy replaced his airplace mode switch but it didn't fix the problem.
    https://www.experts-exchange.com/questions/28579352/W2012-Stuck-in-airplane-mode.html

    This is a compatibility problem caused by programmers at Microsoft. They had to provide us with 'Permanently deactivate airplane mode' button.... :(
     
    Last edited: Jan 19, 2020
  3. Aaron44126

    Aaron44126 Notebook Prophet

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    Ok, strange. The service in question was already set to "Manual" for me, I believe that is the default setting. Was it set to "Automatic" for you? Maybe something got it set to Automatic by mistake and that caused the problem.
     
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  4. John Carlson

    John Carlson Notebook Consultant

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    It was set to 'Manual' by default.

    hmm my guess is still the same. 'Service Host: Radio Management Services' task isn't programmed very well or is not fully compatible with old Dell Precision airplane mode switches.. so sometimes it can freeze your airplane mode switch.

    Another M6800 user stuck in airplane mode after windows update:
    https://www.justanswer.com/computer/a3bwv-airplane-mode-laptop-stuck-off-cannot.html

    I found a few other M6800 owners who had the same problem... so it appears Dell's old airplane mode switch is not very good for the latest Windows 10 updates.

    Most of other laptops don't have this kind of airplane mode switch. They can turn on / off airplane mode by pressing down Fn + PrtScrn. and obviously Microsoft don't have to care about old Dell laptops with special airplane mode switch..
     
    Last edited: Jan 19, 2020
  5. PetrosGR

    PetrosGR Notebook Enthusiast

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    I have a new problem , after it finally boot up. Now i have a problem with this "machine check exception" i try with 3x USB different ones, 2.0 different rams, different O/S even linux now i am downloading hirens boot distro.
    I keep getting after the F12 and the boot order, as soon as it turns on to try and load the "boot menu" > after the F12 when the circle is going to start to load for the Windows 10 i get a BSOD with "machine check exception".
    I have the latest A26 BIOS but again nothing.

    Anypoints ?
     
  6. PetrosGR

    PetrosGR Notebook Enthusiast

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    New update.
    With , Hirens it boots up.

    I have changed the CPU , with a simpler one, i5 etc. and the laptop booted straight up .
    And i swapped the CPU to another laptop and put it the i7 4800MQ and started malfucntioning. So i believe is the CPU problem....

    Also,when i disable the VT- feature and all the "add-ons" on the I7 4800MQ it starts up just fine.

    So is semi - broken ?

    Something like that...
     
  7. PetrosGR

    PetrosGR Notebook Enthusiast

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    Finally last, update.
    The i7 4800MQ is for sure 100% broken .It only works with Single Core enabled.
    The computer doesn't have any other kind of problem.

    So the best thing to do is to buy a new one CPU ,any suggestions ? ( I saw the 4910MQ only for 130$ shipped globally on aliexpress) i think is the best deal.
    Was looking to spend around 100$ ,but i could put a little bit more on it .
     
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  8. powerslave12r

    powerslave12r Notebook Evangelist

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    Anyone know of good options to purchase a 9 cell battery for this machine?

    I believe the part numbers are possibly: FVWT4, 1C75X. Type FV993.

    Any inputs welcome. I found one listing on Dell.com but it's coming out to over $200.
     
  9. unnoticed

    unnoticed Notebook Guru

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    There's not a whole lot of reliable resellers who specifying the cells used in the assembly.
    The two vendors I've bought from and know of are these

    https://greencell.global/en/dell/21...4700-m4800-m6600-m6700-m6800.html#description


    https://www.psaparts.co.uk/laptop-notebook/dell/precision-m4800-battery-extended-life--mk3vja.html

    Not a whole lot cheaper than oem but eh its a little cheaper

    About the talk that non Dell genuine batteries will not charge I cant speak for but on the charger side I have had my original dell chargers teared down and there is only two pins soldered to the pcb, the third is only a dud, not connected to anything inside the case so there technically is no data connection in the cable even though the bios can detect which charger is connected,ie 230w or 240w which I have several of.
    The battery however I do have two M4800 that has power management in bios while the other does not, quick charge, primary AC use etc but I don't know why the other don't have it.
    I simply don't know, but I find it hard to believe otherwise there wouldn't be any spare parts for sale if they don't work unless they're oem parts
     
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  10. powerslave12r

    powerslave12r Notebook Evangelist

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    unnoticed: Thanks for sharing.

    I'm about to just go for it and get the official part from Provantage.com where it's a bit cheaper. Seems like a good company that should have original parts. I don't mind spending the asking price as long as I know it's original Dell.

    If anyone has dealt with them, would help to hear your experience!
     
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