Hello HP-41CL fans,
I bought a 41CL circuit board about a year ago to Monte. I only found last month a fullnut (2422S...) able to receive this jewel.
This morning I read (again) the manual before proceeding, but in a relative hurry, I didn't test the donor. :/
Well, I did everything like everyone. I didn't overtight the screw, but put some rechargeable batteries instead of fresh ones (:/, again?) and started to setup the circuit board:
1. MEMORY LOST appeared normally;
2. After Backspace (<--), XEQ ALPHA MMUCLR ALPHA did apparently the job;
3. ALPHA YFNZ ALPHA XEQ ALPHA PLUG1L ALPHA did what it was supposed to (well I suppose too...);
4. When I operated XEQ ALPHA MMUEN ALPHA, display stopped with this 'XEQ MMUEN'. I think it lasted about 1 minute; then the 'U' began to fade and this fade stopped again at least 10 seconds; I tried to turn the calc off, but no key were responding.
I then decided to remove the battery pack because I suspected a low tension - and remembered I had another one fresher :/
After many different tests, I am at this time unable to do the CL board operate properly: it simply doesn't work anymore - or seems so.
The CV too. Back with the initial board, it doesn't work.
I trust the previous owner (a friend of mine) who sold me this CV knowing the aim of the operation.
I have two questions:
1. Is the CL board definitively out of order?
2. Did I do something wrong?
I don't want to disturb Monte about this - but maybe he is reading this... - and prefer to warn everyone about possible problems due to improper manipulations.
Any help would be very appreciated.
Xavier