GSM_GPRS_GPS_Shield.6...testing problem

hey am new in GPS field and i want your guidance

I am using (gsm-gprs-gps-shield Rev.6) with arduino Mega2560..

this is the PDF fie that shows the connection :

if i connect the power pins of the shield to 5V ... i should get light indication on the shield module..but am not getting it.. is there any other way to test the GPS ?

Looking forward to your reply

According to the shields schematics there is no LED that signals power. Both LEDs are controlled by the chips (either GPS or GSM), so they signal some status and probably don't go on immediately when power is supplied.

The manual describes the functionality and also there no permanent light seems to be expected.

How do you power your Arduino? By USB?