|Re: My 41CV won't turn on|
Message #2 Posted by Les Wright on 22 Jan 2007, 9:52 p.m.,
in response to message #1 by Chan Tran
I have a buggy IR module (see earlier thread). I did notice some peculiar behaviour at one point and I needed to take all of my modules out and reset the calculator. This is done by holding down the ON and <- simultaneously, then releasing the ON key and finally the <- key. If the reset went well you will see MEMORY LOST. Fortunately, anything of importance on my CX I had in either cards or barcode so clearing the RAM was no loss. Looks like your RAM is corrupted if the display shows gibberish.
Since the reset, I have had no problems. The IR module still tests as BAD to TESTP, but it is partially usable and doesn't seem to interfere with the calculator operations. When you get your calculator going, run TESTP to see if the module is OK or BAD. Also, I have noticed that my IR module seems to slow down keypad response slightly though perceptibly. Indeed, when I had the difficulties warranting the reset, I took the module out very quickly after turning the calc off. I wonder now if the calc really was off, so now when I turn it off to remove or insert a module or peripheral I wait a couple of seconds just to be sure.
If the ON-<- reset combo doesn't work, there are other things to try--leaving the batteries out overnight, inserting them backwards to clear the constant memory are a couple of options I have heard of but I have never tried them myself.
An HP41 that won't turn on with good batteries installed is one of the most frustrating and dreaded experiences of those who love these calculators. If your machine can be revived without a service call to FixThatCalc.com or plamoid or someone of that ilk, I am sure someone here can help you.