Hi,
I've just purchased a HP-67 thats in immaculate condition. Other than the card readers gummy wheel, and a display problem, it seems to function fine.
When I first switched the machine on, and performed some calculations, the LED display functioned OK. After about 30 seconds, one segment (top segment) on the 10th digit from the left flickered and then switched off. The next morning I switched the machine on and the segement was OK again, but after 10 seconds it switched off. Other than this the HP-67 functions without any problems.
I don't wish to open the machine and cause some irreversible damage, hence, does anyone have any theories as to what this could be. I think it could be an aged component, such as an electrolytic capacitor, but thats my theory and I may be barking up the wrong tree.
The other thing about this machine is that it has a 7-pin connector on the left of the top panel. The previous owner of the machine acquired the machine from a friend, hence, he has no idea what this was used for. Is this a printer interface?
I have not opened the machine yet, but will do so to repair the card reader and, hopefuly, the display problem. Only then I will know where the internal connections of the 7-pin connector are terminated. I can tell from the back of the machine that it has been very carefuly opened. Maybe it was opened to install this interface. Does anyone know whether HP installed interfaces on HP-67s on request. Furthermore, would anyone know what type of interfaces could be fitted to the HP-67.
Any help would be appreciated.
Thank you & Best Regards