Hi all,
Long time lurker, first time caller.
A few years ago I picked up a Brazilian made HP15C. Recently it has been playing up a bit. Every now and then when I go to turn it on I get a PR-Error and today when I went to switch it to radians from degrees the screen went blank and it refused to turn on until I removed and replaced the batteries. I've checked the self tests and they all pass.
I've had a search around but can't find reports of any similar issues. Any ideas? I have a WP34S and an HP49G but there's something rather beautiful about the 15C and it's always my first choice for a quick calculation.
Paul