Unable to establish a connection.
The port 'COM16" does not exist.
Being kinda new to this I was using a MP with the 9.0 Mavlink with the 2 APM 2.0 & 2.5 boards I have. But I wasn't getting any HUD on the MP. Using the Mavlink 9.0 I could upload Firmware and Connect via USB & 3DR wireless link. Everything seemed fine. After the software upgrade to MP 1.2.20 it appears that my Com Ports assigned to both boards don't exist.
(I was also able to previously setup a Quad that was pre-programmed to get RC transmitter set up and motors running. To check the board I was hoping to get a HUD as I found should have been available, hence the MP upgrade.)
I am using Windows XP 32 Bit with SP2.
I have .NET Frame 3.5 & 4.0 installed.(also removed & re-installed)
FTDI Drivers are installed too.
I have tried 2 different USB leads.
The Red & Blue lights flash, but out of sync. The Green power light is on.
I've tried using the Reset button.
I don't get the Ding that indicates a USB device is plugged in.
The boards show up in the MP Com drop down menu. They also show up in Device Manager under Ports. I am told though that No Driver is installed, yet I get all the Device information in the window. When I try to install the Arduino Mega 2560.inf the Wizard does not allow me to OK the folder in which it is placed. Checking in the Folder - WINDOWS/SYSTEM32/DRIVERS shows the file 'usbser' exists.
I've downloaded USBview off the FTDI website and this shows the board when connected & disconnected.
I'm guessing the problem may lie with the Driver not being installed but I can't get the Wizard to recognise it. I've also tried earlier versions of MP prior to the recent 1.2.20 such as 32-1.2.19, 32-1.2.13 & 32-1.1.92. I'm not sure the version with Mavlink 9.0 as the upgrade overwrote it.
Also, for example, if I connect the APM board and then say plug another USB device in it won't be recognised until the APM board is unplugged. eg. iPhone, USB BT Dongle.
I hope I've given enough information on the problem.
After close to 20 hours working on this problem I'm at a loss and hope someone with more experience may shed some light on the problem, or offer ideas for a fix. It would be really appreciated.