HP PRIME WON'T CHARGE

[Insoft]

I experienced the exact same issue. I left it plugged in, and even though the charging icon was disabled, it did eventually charge the battery. However, if it’s plugged in and I try to power it down, I get the spinning timer symbol instead. I’ve noticed that if I quickly plug it into power and then power it down immediately, it will sometimes turn off and charge.

One thing I’ve observed is that when it’s not connected to power and I shut it down, there’s a slight delay before it powers off compared to a fully functioning unit. My other calculator powers off almost instantly. After encountering this issue, I ended up purchasing a new one, as I couldn’t figure out the cause. That’s why I now have two calculators. I even tested the faulty one with the battery from my new device, but it made no difference, so the battery can be ruled out.

This seems to be either a hardware or firmware issue. Before it completely stopped working, I noticed that some of my PPL programs had corrupted last lines with garbage data after transferring them from my computer. My new calculator doesn’t have this issue, so firmware corruption is a possibility. However, even after a factory reset, the problem persisted, leading me to believe it’s more likely a hardware issue—possibly related to an IC responsible for detecting the USB connection.