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42S for $28USD
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06-18-2015, 09:07 PM
Post: #6
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RE: 42S for $28USD
(06-18-2015 07:50 PM)Dave Frederickson Wrote: I've opened the case and removed and reinstalled the PCB. If I flex the calculator I can get the Memory Lost display. I suspect a bad solder connection somewhere. I'll need to put it under the microscope and do and inspection. The seller reported that he was able to run the self-test and received a URAM failure. If that's the case then I'll replace the RAM with a 32K chip. Anybody have a part number? I think that URAM refers to video ram (when it is tested screen shows "noise"), and as far as I know, that forms part of the main CPU, so changing main RAM won't solve the problem. Anyway, I hope it is just a bad soldering and you make it work. |
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| Messages In This Thread |
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42S for $28USD - Dave Frederickson - 06-05-2015, 11:35 PM
RE: 42S for $28USD - vk6ti - 06-06-2015, 01:09 AM
RE: 42S for $28USD - Dave Britten - 06-06-2015, 09:23 PM
RE: 42S for $28USD - aurelio - 06-18-2015, 07:04 PM
RE: 42S for $28USD - Dave Frederickson - 06-18-2015, 07:50 PM
RE: 42S for $28USD - ElectroDuende - 06-18-2015 09:07 PM
RE: 42S for $28USD - rprosperi - 06-19-2015, 11:31 PM
RE: 42S for $28USD - aurelio - 06-20-2015, 04:11 PM
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