"download not requested" is a cable or com port issue.
You need a "null modem" cable the "RS232 serial" is identical
to look at but won't work.
But lets assume you have got the right one
First, if you need to use your USB converter lead, find a driver the "prolific" driver usually work
HTML:
http://www.prolific.com.tw/eng/downloads.asp?ID=31
Then find the com port number you are using on your computer.
Go into device manager on your computer look up properties on the com port you are using and change
the baud rate (bits per sec) to 115200
then wire up the box and computer and use loader
to load firmware.
note the USB convertor lead don't normally give a very good connection
I had to give mine a couple of wiggles where it connects to the null modem cable to get it to work. It is better if you can plug the null modem straight between box and computer but on newer computers you will need the USB convertor lead.
flash with firmware 24/04/2011 its in the download section on this site, make sure you are flashing with A780 firmware and not A750 as they both have the same date and it will be fine.
Then do a software update from your remote control
Let us know how you get on
It is easier to use an old computer with a serial port and XP, you can then
wire your box and computer together without the extra lead.
but if you need to use a USB convertor then you will have to do this extra step too.
👍