SO, i had an Arduino which is now dead... I bought is 2 days and the moment I hit upload it started to burn an eventually it was dead nothing going on I just plugged the cable and now it is dead...
like literally burn in flames???
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Smokes
Did you have any power source other than USB connected?
No I didn't
Did you have anything else connected to the board?
was that a real Arduino or a clone?
A clone and also a ultrasonic sensor
One of the HC-sr04 type sensors?
Hi, @divyanshundley
What model Arduino is it?
Can you please post some images of the carnage?
What were you using as a powersupply?
Thanks... Tom.. 
HC-sr04 and the Arduino was a Arduino nano
I had connected it to my laptop only
Strip everything off except the usb and see if BLINK works without getting hot. If no, time for a voltage check and new hw.
PS: your schematic just needs pin #s please
I did it and it is not recognised now it's dead
red and black wire are for 5v and gnd and yellow and green are for echo&trigger -> 3,4
Something was reversed/shorted. Get out your voltmeter and start checking. Plug just the nano in to usb and check the 5v and 3v3 pins voltages. Were you using a breadboard? Sounds like 5V and gnd might have been reversed.
Please take a pic of your hw showing all wires & bits.
yes
Show us -- closely -- ALL your physical wiring and all parts please. IN CLOSE UP! LOL we need to be able to read pins.