need help about smps adapter

[sahu]

I have an Hp smps adapter which was burnt. Its output rating is 18.5volt dc 3.5amp. 65watt. This is not available in my local market. But i have another smps adapter with same specification with two output + & - only. But in Hp SMPS adapter there is three wire (RTN, ID and Out which is written on adapter pcb).But I could not understand how these three RTN, ID and out manage with our local smps adapter.
Plz give suggestion so i can do my work properly.
With thanks.

 

[kabiru]

How many amps can your smps can provide and what is your output voltage of the power supply?

 

[prince213]

these extra pins have some added functions, try to get genuine one's.

 

[pranam77]

Order a genuine Adaptor from HP acessories online.
Cheers