Firmware flash failure - no access to port speed adjustments
Last successful flash I needed to slow the transfer speed by going into Device Manager/Properties/Port Settings/Advanced, which gave me a couple of slide controls to lower the Receive and Transmit Buffer speeds. Now, on four different Windows computers (two Win11 and two Win10), Port Settings is not an option. (And for completeness, this is all concerning a Mk3 system with a new Einsy board installed.)I found that many others have had similar problems, some apparently due to a need for special adaptations in Win11 – which I did not need for my previous two successful flashes – involving administrator privileges or other system modifications. Now I am back to being unable to get an option in Device Manager to alter Port Settings. Possibly the most curious part of this is that when I first plugged the printer into the USB port, the Com port did show me the Port Settings tab in Device Manager/ComPort/Com3... until Device Manager got around to identifying the com port as 'Original Prusa i3 Mk3 (Com3.)' So long as the port was identified only as Com3, I had access to Port Settings, now that the port is identified as a Prusa printer, I don't have that needed access.
In the meantime the two laptops I first tried to use, one successfully after lowering the transfer speeds, have both had suggested software modifications for 'admin,' etc.
So, why do I lose access to Port Settings once the computer identifies the printer? What else might allow me to successfully flash printer firmware?
RE: Firmware flash failure - no access to port speed adjustments
Update: I discovered that if I 'uninstalled' the printer com port, when I plugged the printer back in, Device Manager now provided Port Settings in the Properties. Unfortunately, fiddling around with the speeds did not provide the magic touch: flash failed, several times. As I got the Port Settings back with two computers, I think I found the work-around for the problem with the other two computers, laptops, so next try will be out in the shop, rather than my hauling the printer in to the desktop PCs. Still could use some ideas about getting firmware flashed. Two successes with the 'new' einsy, with an old firmware package replacing a newer one in an effort (successful) to get past the wizard test, now I'd like to try again with the newer firmware - which I cannot get installed. All this after the trouble of replacing the einsy, which was not trivial.