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+--- Forum: Not quite HP Calculators - but related (/forum-8.html)
+--- Thread: Battery issue in DM1xCC, downgrade firmware (/thread-15047.html)
Battery issue in DM1xCC, downgrade firmware - johanw - 05-24-2020 12:30 AM
According to https://www.swissmicros.com/voyager/firmware/history.txt, "V30 firmware was removed after confirmation of excessive consumption in OFF mode, Everybody should revert to V29 firmware."
I just did but that was not easy, it took me several times before the update tool recognised the device and flashed it. I used a mini-USB cable I had lying around from an old phone, are the SwissMicros calculators so sensitive to which calbe you use? They sell a shielded one, would that matter much?
RE: Battery issue in DM1xCC, downgrade firmware - ctrclckws - 05-24-2020 01:14 AM
You do need to use a known good cable. This time I used on from an old external hard drive. I have several DM-xx models, large and small. One or two took a little fiddling, the others worked with no issues.
I did have to make sure the COM port chosen was correct. This time it was COM5.