if i connect my Mega2650 using a 30 feet active USB cable to my fairly new ASUS laptop with Win 8.1 my project (Baseball scoreboard) is working perfectly.
The final solution at the field itself should use an older Acer Aspire 5720 with Win 7 32bit (SP 3) to control the scoreboard. All the latest drivers are installed and the Acer laptop is recognizing the Arduino Mega and uses the same com port and settings as the ASUS. But if i try to control the scoreboard it does not receive any data.
Anyone having an idea what the root cause could be? Thx in advance Cheers Wolf