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PostPosted: Thu Mar 28, 2013 5:03 pm 
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I bought a new powersupply thinking my old one has failed. I has since learned the shorting off pins 1 and 2 on the powersupply to test that it is working. And the new one I got works too. Prior to this, the system would turn on for second, turn off, turn on, etc.

However my ex 485 still doesn't turn on at all with any powersupply.

When I plug it in, the network port turns amber for a millisecond, and then nothing. I noticed that the board was warm, and discovered that the SMSC SCH5127-NW chip underneath was too hot touch. Not sure if that indicates this chip has failed, or if something else is going on.


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