Flakey HP 70: post modified as RAM Chip identified.

[Geoff Quickfall]

Interestingly, the entry of all financial knowns works as expected from the entry point of view. Execution of the unknown results in the 'running' display of flashing led segments. The result is an 'error' message most likely a dived by zero error.

So I too am hoping RAM, not ROM.

This was also pricey but came with the following:

The manual in perfect shape
The real estate manual
Guarantees and sales brochures.
Aluminum sticky personal labels (3)
Envelopes,
Original shipping box with a November 73 postmark.
Wall wart
Two battery packs, one new from eBay and the original
Spare bezel (face plate).
No corrosion.
Unopened rear label.

It was advertised as working and looking excellent. The looking excellent was correct. I discovered the non working side of things. In fact this calculator works perfectly as a basic 4 banger with no memory but a 4 level stack. So the seller only tested the basic functions and assumed that meant a working calculator. If you don't know how to use the higher functions then how can you test them?

In any case, I got a mutually agreed substantial refund when I explained the problem. No mess, no fuss. So I am happy either way (working or not) but it would be nice to get it functional and looking factory fresh.

Cheers, Geoff