hi friends , i tried everything nearly 3 week . i cant upload firmwire to my a10m . i did before but now i dont know whats happened. usb com is ok , motherboard correct selected in ardunio app . i get always skt500v2 timeout error .big blocks on my screen and i cant use printer :(
you have "bricked" your board, so you want to look for "unbrick GT2560" which should give you all the help you need.
Here are already some threads:https://www.geeetech.com/forum/viewtopic.php?t=19120&start=60http://www.geeetech.com/forum/viewtopic.php?t=62179https://www.reddit.com/r/3Dprinting/comments/a58ycm/geeetech_a10_bricked_need_help/