Problem with Radio and FM Transmitter.
 

After I have installed blessn900 (camera application) and of course automatically fcam drivers, my radio application stopped working. When I am running this application "null" appears on the screen and I am not able to receive any station signal.
My FM Transmitter also don't work.
Does anybody have an idea how to solve this problem?

Re: Problem with Radio and FM Transmitter.
 

are you sure it is a software issue? Usually the FM chip gets loose.
Does BT work?

Re: Problem with Radio and FM Transmitter.
 

Try a full power cycle:
shut down N900
wait until screen is fully dark
pull battery
wait a few seconds (push the power button for 3s)
assemble and power up

Re: Problem with Radio and FM Transmitter.
 

FM rx requires bluetooth enabled, they are on the same chip.
I think it also requires headphones plugged in to enable and act as an antenna(I think the FM broadcast band pin & trace from the Bluetooth chip connects to the headphone ground ring) but I think that can be bypassed though without an antenna you need a strong radio station to get any signal.

Re: Problem with Radio and FM Transmitter.
 

Objection, your honour!

They are on the same chip, that much is true. But FM does not require Bluetooth enabled. I had BT disabled for the first 5 years of using my N900 as I simply had no use for it (nothing to pair it with), so there was no point wasting the power. But I made an excessive use of FM, both RX and TX.