YFNX does not work on my 41CL

[hth]

OK, I tried to update the 008 sector. I downloaded the Update module to the MLDL, set up the 008 sector in RAM, picked new YFNX and YLIB over HP-IL and went ahead with P8UPD.

Pressing R/S and it indicates that it starts erasing sectors 008 and hangs there for a while. Eventually the display goes blank and if I try to get in control pressing keys the display comes on with characters that I have never seen before, like it is only showing the upper half of the segments for a weird low characters random view. I thought the HP-41 had a character set for the LCD and could not display characters like this, LOL.

I tried it twice with the same result (different but similar weird displays).

Anyway, I cannot seem to get it to work, any idea what is up?