thanks very much Bob, Ángel, Ian.
rprosperi wrote: ↑Sat Feb 01, 2020 2:24 am
It's worth the small effort to try a h/w reset via pin in the back, but I'd guess it won't change anything.
…
I'd already tried the reset button, no joy. I've removed the battery, held down the On button, and shorted the contacts, again no joy. Have done so again and will now leave overnight without battery.
Ángel Martin wrote: ↑Sat Feb 01, 2020 8:06 am
Maybe also worthwhile try clearing the user flag 49 and see if BAT disappears...
Then switch the calculator OFF.ON again. Should add more details for diagnosing.
I'll try that tomorrow. I thought flags > 30 were read-only system flags; is that different on the 41X?
ijabbott wrote: ↑Sat Feb 01, 2020 12:42 pm
Also check the
Vdd value on the DMCP Self Test Diagnostics page. I think it should be reasonably close to the battery potential in millivolts, except when powered by USB. In any case, it's more info for diagnosing the fault.
I had noticed that Vdd was odd (1221) yesterday, so assumed it wasn't what I thought it was, and didn't report it, sorry.
Just re-checked: the battery voltage is down 0.1V, to under 3.1V (3.17V yesterday to 3.07V today) despite no use.
Vcc on SPI2 header reads the same as the battery.
Self-test screen shows: Vdd:1221,cal:1666 — those are the same values as yesterday, despite Vcc dropping over 0.1V
Vdd 1221 is interesting, if it's supposed to be 3V? It doesn't fluctuate at all, and is the same value as yesterday, which seems unlikely if it's indicating millivolts.
If others don't mind trying the self-test (BUT read on first), I'd be interested in their Vdd values.
NOTE: the diags self-test screen doesn't seem to have a way out of it, other than waiting for it to timeout (600s?), or pressing the Reset button, which will cause the emulator a Memory Lost, so don't do that if you have stuff to lose.
thanks!