Serial port COM11 is not found!

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hi everybody!

i working on arduino uno project controlling 2 servos, don't have problem project because have tried many times , add updates on it.
suddenly, "serial port com11 not found" message appear me!! :smiley-eek-blue: :( :( , have tried many solutions read forum fix problem, such restarting pc,  try re install  driver, go devices manager , delete arduino uno com11 , add again, still problem not solved.  :smiley-sad-blue: =( =(
please need possible because i'm working on important project.  :) :)

quote
i have tried many solutions read forum fix problem, such restarting pc,  try re install  driver, go devices manager , delete arduino uno com11 , add again, still problem not solved.  smiley-sad-blue smiley-cry smiley-cry
please need possible because i'm working on important project.  smiley smiley


if have tried these suggestions didnt work have tried atmega8u2 or 16u2? mean reading fuses etc or trying connect isp it?


Arduino Forum > Using Arduino > Installation & Troubleshooting > Serial port COM11 is not found!


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