HP 34C turning on but Error 0, zeros, frozen

[goncal]

(07-11-2018 03:29 PM)PANAMATIK Wrote:  

(07-11-2018 09:20 AM)goncal Wrote:  I would love to fix my beloved 34C but have as yet been unable to find any information on fixing this particular error.

Any help would be greatly appreciated.

Error 0 and Error 4 without doing any key operations seems to be a defective ROM or processor. As you have a soldered version of this calculator, the usual contact problems of the solderless type cannot be the reason.

I will build a repair kit for the HP-34C until november of this year. It is based on the Woodstock LP circuit but fits into the HP-34C case. A prototype is already running. This would allow you to repair your beloved calculator if only the display is still OK.

Bernhard

That would be fantastic Bernhard. I had already been looking at your Woodstock kit which of course I cannot use. Thank you.