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Samsung 2223NW overheating

Discussion in 'Troubleshooting and Repair' started by Dragunov, Jun 22, 2013.

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  1. Dragunov

    Dragunov

    7
    0
    Jun 22, 2013
    Hello,

    im new in this forum and i need some help.

    I have 2223NW monitor that is obviosly overheating somewhere.

    I got it with a "defect" didnt know what kind in the november it was working till yesterday.

    The summer came and tems are 30-36 degrees celsius.

    Lamp blinks few times and monitor goes to standby. (it works longer in the evening when temps are lower)

    I looked at capacitors and by the looks of them they are ok (didnt remove them and test).

    What other thing could be overheating or heat sensitive???

    (If i would know what is overheating i might get some solder to it to spread the heat.)

    I know this is noob like but help the man out. :)

    Thx.
     
  2. duke37

    duke37

    5,343
    753
    Jan 9, 2011
    It Is midsummer and I am shivering !

    What is the age of this device? If it has been in use for a few years it may be very dusty which will reduce the cooling. Try giving it a good blow out.
     
  3. Dragunov

    Dragunov

    7
    0
    Jun 22, 2013
    No dust at all.

    Manufacture year 2008.

    :)
     
  4. Dragunov

    Dragunov

    7
    0
    Jun 22, 2013
    P.S. now its working ok outside temp is like 25 C.

    What might be the problem?
     
  5. davenn

    davenn Moderator

    13,561
    1,856
    Sep 5, 2009
    buy a can of freezer spray and target individual components
    when it starts behaving ok then you know you have found the faulty component

    freezer spray is the age old technician's best friend :)

    Dave
     
  6. Dragunov

    Dragunov

    7
    0
    Jun 22, 2013
    Hmmm il try to find it but in my town there is no electronic parts store so it might take a while.

    Any other ideas from experiance?
     
  7. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,363
    2,758
    Jan 21, 2010
    The easiest other way is to purchase a can of "compressed air" from somewhere (I get mine cheap from an office supplies company).

    If you invert the can, it turns into instant freeze spray.

    Just be careful, the contents are flammable.
     
  8. Dragunov

    Dragunov

    7
    0
    Jun 22, 2013
    Are you kidding me ???

    Last time guy bought can of compressed air in my it shop and inverted the can sprayed on a brand new cca. 2000 € new rig it bursted into flames LOL. Lightshow.

    No warranty case closed.
     
  9. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,363
    2,758
    Jan 21, 2010
    No, I'm not kidding you.

    Like I said... "Be careful, the contents are flammable"

    I would be visually inspecting the filter capacitors in the power supply first.
     
  10. Dragunov

    Dragunov

    7
    0
    Jun 22, 2013
    Allready checked them they look like new. As a mather a fact all power pcb looks like new no signs of heat like on some monitors.

    That still might be the case i had dreambox ouance that had all capacitors visualy ok but would not boot.

    After desoldering all of them and test them 20% was dead after changing it booted normaly and still working.
     
    Last edited: Jun 23, 2013
  11. duke37

    duke37

    5,343
    753
    Jan 9, 2011
    It is obviously very close to working or not working.

    It can be heated with a hair dryer if working or cooled with a blast of air from a small fan to cool it if not working. The outlet from a vacuum cleaner is warm and perhaps could be utilised.

    Go gentle on the heating.
     
  12. Dragunov

    Dragunov

    7
    0
    Jun 22, 2013
    Thats not a bad idea i have an industrial fan somwhere for reflowing bga.
     
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