Brockmd Posted August 30, 2021 Share Posted August 30, 2021 The fire button on the joystick from joystick port one does not fire. It works on port two. Any ideas on what I can try? Thanks! Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted August 30, 2021 Share Posted August 30, 2021 Fire buttons are handled by the GTIA chip, not the PIA, so first thing is to check continuity from both joystick ports pin 6 through to the GTIA chip pins 8 and 9. If not good, there may be a cracked solder joint that could use some solder reflowing. If it is good, next would be to try replacing the GTIA chip... 1 Quote Link to comment Share on other sites More sharing options...
Brockmd Posted August 30, 2021 Author Share Posted August 30, 2021 Nezgar, much appreciated. I will try that tonight. Quote Link to comment Share on other sites More sharing options...
Brockmd Posted September 8, 2021 Author Share Posted September 8, 2021 Installed new GTIA chip. Fire button works now!!! Nexgar, I appreciate your help. 3 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted September 9, 2021 Share Posted September 9, 2021 Good to hear! Might be worth cleaning the legs of the "bad" chip and seeing if the simple fact of removing/reseating it gets it working again in case it was just a continuity problem on the pins or socket. Also test it in another computer as a last measure before tossing it... 2 Quote Link to comment Share on other sites More sharing options...
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