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[Moved]SIM900A not working, please help

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Arup4th

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Hello Sir I am new in this forum. I am using SIM900A first time, it was working nicely. But suddenly it does not work. It is powered on by 12 volt DC, power led initially ON, but after few seconds it goes OFF automatically. Status led, network led are completely off. AT commands are not accepted. Pls help Sir. It's not working.
 

parthe

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step-1 check the heat on sim900a module if the heat is ubnormal then the fault is total module...

step-2 check the voltage across pin no 56 57 58 with ground
if the voltage is show 0 the check the voltage regulator.

step-3
using 2 AA battery in series (3volts) connect the 5 volt point and check now.
 

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