Arduino Dead USB port, looking for programing arduino through pins

Development Tools IDE 1.x
1

I looking for programing arduino through pins
one capacitor from my arduino nano just burn, so i can't turn on or program arduino by usb but it still working if i power on by Vin pin
I would like to know if it is posible to upload programs to arduino using a USB/FTDI board to Arduino pins
So i guess the only missing pin i need to conect is DTR pin in arduino

Have any of you this problem before?

cheers

2

Then connect any USB/Serial adapter to D0, D1, +5, Gnd, and its DTR pin thru a 100nF cap to the reset pin.

You may have to remove the two resistors that connect the 16U2 Rx/Tx output to the D0/D1 pins.

3

Can you ID the capacitor that failed? And perhaps see any possible causes or reasons for failure.

4

i tried but it don't respond, even i tried with a working arduino nano but also get:
avrdude: stk500_getsync(): not in sync: resp=0x00
then i tried connect an arduino uno board with atmega removed to an arduino nano (reset tx rx 5v gnd) but again get same "no sync error"
do i missing something??
the only thing i didn't ID is the resistences from TX and RX to remove, is it mandatary??

thanks for all the help you bring me and thanks for the effort you do to understand my english

5

If the onboard USB/Serial chip has its outputs hung up in some state that prevents the Rx/Tx lines from working, removing the two resistors may be needed.
They are part of RN4, an 8-pin, 4 resistor package.
You can remove it, and then put a 1K resistor across pins 4-5 for the Power LED.

Are you sure you didn't fry the '328P chip also? What were you doing when the capacitor burned?