This is probably very easy for someone but its driving me crazy.
I have an Arduino uno R3 board i bought 6 months ago. I used to use it fine on my desktop pc but not used it for a while. I decided to dig it out again and have another play with it. I have a Panasonic CF29 toughbook laptop running xp. I downloaded to software, installed the drivers. Check my COM port setttings in device manager then set com port in sketch software. I check uno is selected in board type. Tried to upload the blink sketch but it won't upload. I get error:
avrdude: stk500_getsync(): not in sync: resp=0x00
If i press shift and select upload i get error:
avrdude: ser_open(): can't open device "\\.\COM11": Access is denied.
Rx and Tx leds do not blink during the upload process. I have changed usb leads also swopped arduino to another com port. Tried reinstalling driver and rebooting etc. still no luck.
I fired up my desktop pc that i used to use the arduino on and everything works perfect. I can upload a sketch no problem. Any advise would be good.
Mark