Turbo Express buttons unresponsive

[aapljack]

The video and audio on my Turbo Express went out a while ago. I only recently found this site and learned about both the audio and video fix. I was able to pick up a new cap for the video fix and got that done yesterday and the video works great.

Once I had closed it back up and tried to play it, I discovered neither of the buttons (I or II) were working. Run, Select and the D-pad all work. In the process of trying a few games, button II started to work and I could play R-Type, but button I continued to be unresponsive.

I opened it back up and swabbed the contacts with a little rubbing alcohol. I did the same to the contacts on the turbo switch. This did not help. My button II still has to 'warm up' before it starts working and button I just doesn't work.

Is there anything else I can try? Would using a contact cleaner like DeoxIT work better?

I am so close to having a functioning TE again. I hope I can get the buttons working. Thanks for the help.

-brian

[Duo_R]

You find some residue under the button I and II? IT is possible that the PCB there corroded, and no longer making good connection. The best solution I have is to replace the I and II with a new "button" but I have only done this with a run button. Red Ghost and I were just talking about this process that I came up with to fix Run buttons, could also be done with the I and II buttons with some work.

[Necromancer]

Have you tried cleaning the button itself (the rubber contact, not the pcb)?  Perhaps they're a bit dirty or the conductive coating is worn off, which can be fixed with a fresh dab of conductive paint.

[aapljack]

Have you tried cleaning the button itself (the rubber contact, not the pcb)?  Perhaps they're a bit dirty or the conductive coating is worn off, which can be fixed with a fresh dab of conductive paint.

Thanks for the idea. I will try both, if necessary. Is rubbing alcohol ok to use as a cleaner for the pcb and the button? Or should I get some actual contact cleaner?

[Duo_R]

Rubbing alcohol is fine, just don't use like 90% rubbing alcohol without diluting it with a little water.