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MyQ controller not working

I have the 8500 Jackshaft and the 888LM MyQ control panel. This has been installed and working properly for about 2 years. Yesterday, I could not open the garage door manually(from pushbutton on garage wall). I noticed the red and yellow lights were blinking. After about 1 hr, there were no lights blinking. I unplugged the Jackshaft and plugged back in. I cannot open the garage door manually from wall control unit, I can open from all programmed remotes. MyQ does not function from cell phone and I get error message 308. Troubleshooting...removed wall controller, checked voltage to controller=ok, if I short wires out, the garage door will open.
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