SINGLE TOOTH Posted October 21, 2021 Share Posted October 21, 2021 Had this ti99/4a for years and finally booted it up again. Years ago I installed the F18A v1.5. Now I can't seem to get past the press any key screen. I don't think it's a faulty keyboard issue. I've got the kind with the gold contacts that press together when I pop off the key cap. Also the controllers seem to do nothing if I spam the buttons. Quote Link to comment Share on other sites More sharing options...
+arcadeshopper Posted October 22, 2021 Share Posted October 22, 2021 Could be a bad controller but I'd test it without the keyboard and be sure.Info in the FAQ in the pinned post in the keyboard matrix and pinoutSent from my LM-V600 using Tapatalk Quote Link to comment Share on other sites More sharing options...
SINGLE TOOTH Posted October 22, 2021 Author Share Posted October 22, 2021 I took the F18A out and get a monochrome fuzzy picture and still hangs. Quote Link to comment Share on other sites More sharing options...
Tursi Posted October 22, 2021 Share Posted October 22, 2021 Is it playing a tone or does it beep correctly and go quiet? If the beep is correct, then either the keyboard ribbon cable is damaged or the 9901 is probably bad. The ribbon cable you can probably determine by inspection (especially check where it solders to the keyboard PCB, it breaks easily there). The fuzzy grey screen with a 9918 is weird for an NTSC machine... not on RF is it? 1 Quote Link to comment Share on other sites More sharing options...
SINGLE TOOTH Posted October 22, 2021 Author Share Posted October 22, 2021 No not rf. I put the old video chip back in Quote Link to comment Share on other sites More sharing options...
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