wrt54g v5.1 shorted

Discussion in 'General Electronics Chat' started by freakazoid, Jul 2, 2011.

  1. freakazoid

    Thread Starter New Member

    Jul 2, 2011
    4
    0
    hello i am quite new at this forums hence don't know whether i am posting in the right place anyway here goes

    i accidentally shorted the power pins of the power connector on the pcb while trying to install a 12 v dc fan i tried to do all of this while the power was on so i ended up short circuiting the board .....
    after this the leds of the router don't light up and the brodcom processor chip gets insanely hot

    so my question is how can i figure out which component got shorted during the short circuit

    these are all the ic with markings on the board

    AP 1513
    0602DA
    8-PIN IC
    next to the power connector i suspect it is a DC-DC converter

    EVC14AAS360
    URG05
    23D
    7-PIN IC
    Don't know what this is..

    AP1635
    0547C
    8-PIN
    another dc-dc converter i think this one is next to the leds


    the other ic are the ram,flash and the processor

    my knowledge in circuitry is very limited so any help is most welcome my initial thought was that the dc-dc converter got shorted as none of the lights light up and the processor get very hot but as said earlier i don't know for sure and would like professional help before i go off changing components


    thanks in advance
    :p
     
  2. freakazoid

    Thread Starter New Member

    Jul 2, 2011
    4
    0
    cmon anybody :confused:
     
  3. #12

    Expert

    Nov 30, 2010
    16,248
    6,745
    You've asked in a place that has lots of people with knowledge of circuits. They aren't answering because people with lots of knowledge don't even try to fix a $30 box that operates in the gigahertz range.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
  5. freakazoid

    Thread Starter New Member

    Jul 2, 2011
    4
    0
    thank you for your help....
    but from your experience which component do u think got effected frm short circuit which is causing the main broadcom ic to heat up so insanely as this is common in all pcb to an extent.... when their short circuited i always have observed that one of the main ic start getting hot.....

    sorry for being a noob
    [​IMG]
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    I'm sorry, but my Ouija board seems to be on the fritz at the moment.

    Seriously though, I don't have one of those routers anymore; I threw mine in the trash mid-March because I thought I wouldn't need it again. I have no schematics. I don't know where you shorted yours out. While the part numbers allowed me to find two out of three of the datasheets, I don't get the idea that you are capable of providing such details as what voltages you are reading at the inputs and the outputs of the IC's.

    Since they are undoubtedly surface mount devices, it is furthermore unlikely that you will be able to unsolder and remove them without destroying the board, and then soldering in replacement parts without destroying the new part, making poor solder joints, nicking traces, leaving solder balls, etc.

    Your best bet is to buy a replacement router. You can sometimes find such things at surplus places or at college bookstores if they sell "recycled" computer stuff.
     
  7. iONic

    AAC Fanatic!

    Nov 16, 2007
    1,420
    68
    Buying s replacement router is highly reccomended as Sgt. Wookie has so eloquently ellaborated upon. I just sold that same router on Amazon for $20, so I'm sure you can find one for a similar price. It really isn't worth the time, money, and agrivation troubleshooting and repairing it.
     
  8. tom66

    Senior Member

    May 9, 2009
    2,613
    213
    If you shorted something out on the board, you may well have toasted the Broadcom IC itself. That's next to impossible to replace.

    Why did you have the router powered on while you were modifying it?
     
  9. freakazoid

    Thread Starter New Member

    Jul 2, 2011
    4
    0
    guys i already bought another n series router all i wanted to know was whether it was possible to fix cause. if it was just a small component problem and well i guess i dont like stuff lying around useless .. well i am still gonna play with the router yes i cant solder very good so i will practice on this if i succeed i will post back on this forum with details just taking it as a project as my summer holidays just started

    and the thing with modding it with the power on well what can i say i was lazy and an idiot too
     
  10. bobcart

    Member

    Jul 7, 2011
    55
    2
    look at the board carefully to see if you find anything burnt. sometimes you can see burn spots. start at power input. use your dmm to test components as you go. try to follow the leads. hold the board up to a light and look through it so you can see components on top and traces on back. you probably don't want to get it hot while doing this.
     
  11. tom66

    Senior Member

    May 9, 2009
    2,613
    213
    If the Broadcom IC is getting extremely hot then it is probably broken.

    You can probably buy a new one, but have you ever tried to remove a BGA? Next to impossible without the right tools.

    Also, you do not know if there is extra firmware on that IC that you cannot replace.
     
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