HC05 Bluetooth module detected but not connecting

[nunommm]

I am trying to work with a HC05, utilizing the following video as a guide.

Como parear conectar módulos bluetooth no Arduino HC 05

An arduino mega 2560 was used with the HC05( No button).
The arduino mega was connected with an usb cable to my computer so it could be configured by using the AT commands.
All was going well, i received the "OK" messages which meant the HC05 was working.
Then i disconnected the board from my pc and then powered the arduino with a 9 volt power source.
I connected my computer to the HC05 via bluetooth but when i use TunerStudio, it detects the bluetooth device, the name and all but it wont connect, it failt to connect to the COM and just says Failed.

[sterretje]

Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project.

[Nick_Pyner]

@nunommm

9 volt power source.

IF that is a 9v PP3 battery, it is very likely your problem. Surely you can test this by reconnecting to the PC you used in the first place?

[Railroader]

What powerdoes that 9 volt source supply have? How many amps, or milliamps?