I can see some members of this forum have successfully upgraded their 8341b from 1988 to 1992 firmware. I'm trying to do the same but it isn't working :(?
The CPU board in my 8341b has 4 EPROMS, so I downloaded the 8340 .bin files from K04BB. I bought 4 used EPROMs exactly same model as what is already in my 8341b. And I paid someone to program the firmware into them for me. I fitted them but the instrument wouldn't boot (random characters marching across the screen error).?
I refitted the original EPROMS and the unit did then boot, but it had lost/corrupted the cal constants and I had to enter these back in from the sheet of paper. It works normally now with the original EPROMS fitted, but I can't understand why the new firmware didn't work ?
Serial prefix is 2891
Is there some hardware update that is also required ? or could there be a problem with the new EPROM programming ???
