1980sgamer Posted June 11, 2022 Share Posted June 11, 2022 I picked up a couple of c16s off Ebay - one I got working, the other black screens - even though I have tested working CPU and TED. I have had a c16 in the past where the socket became oxidised and after resocketing - CPU worked. This time I tried resocketing...someone has been in there before - a trace was lifted which I soldered down - but now everything seems to be making contact...still black screen. I socketed one RAM chip - just to see - but it it is the same. Any other known problematic chips in the C16 to replace? I have tried to do my research... Quote Link to comment Share on other sites More sharing options...
carlsson Posted June 12, 2022 Share Posted June 12, 2022 Hard to tell, but perhaps try to read the ROMs in case those are socketed? I mean bit rot can cause the CPU to get stuck in the boot process even if the delicate chips themselves still work. Quote Link to comment Share on other sites More sharing options...
1980sgamer Posted June 12, 2022 Author Share Posted June 12, 2022 Appreciate your response! I thought it might be a bit too vague...the PLA/ROMs are all OK. I thought there might other chips prone to failure - like c16 equivalent of 8701... Quote Link to comment Share on other sites More sharing options...
1980sgamer Posted June 13, 2022 Author Share Posted June 13, 2022 Anyway - for the record or if anyone else is searching around for C16 issues. I have managed to get the C16 working now (sort of - Diag264 runnign)...even though I socketed the CPU and RAM - I used further deoxidiser on the legs/sockets - and I have found this to help bring C16s back to life or to a state where something is happening. At the moment Diag264 is running until it gets to the Basic Rom then stops...I have tried a couple of working ones...so I will probably resocket the Basic ROM - because it seems to be the IC sockets on the C16 that cause most of the problems. I have an 8501 that I thought was non-operational. But with deoxidiser and cleaning it came back to life. So before you give up on your CPUs and TEDs - try deoxidiser. Not really groundbreaking information I know... Quote Link to comment Share on other sites More sharing options...
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