Hi,
New to the forum. I picked up a used Neptune MDE6800AYW yesterday and it appeared to work fine at the guys house (1.5 hours away - was looking for the match). All I did for testing is hit some buttons and made sure it heated up. Loaded it up and brought it home.
Now it appears to work -functionally. I looked at diagnostic codes and saw an 08 - stuck key. Cleared it and figured it was an old code. Everything appeared fine. Did the sensor dry for a few minutes and then turned it off. About 5 minutes later it beeped on its own and it the panel was on again! What the?!? Did this several times. Plugged and unplugged a couple times. Same thing. I would hear 3 beeps in succession on occasion. Went into SC mode and tests appeared to work fine. It got progressively work (probably as I pressed the various buttons testing hundreds of times) The buttons are now responsive 90% of the time, but it just chirps intermittently like morse code - rapid fire beeps, sometimes on top of each other. It still appears to run fine, but when "off" (panel dark), it does that fast morse code thing. when I unplug the ribbon connector, it goes silent. Plug it in - chirps like a bird. I got my multimeter and jumped between the pins according to the chart for the settings keys - I had to use paperclips to get in the connector! All registered a "1" - which is open (touch the probes and it goes to "000").
I believe it is the panel, and would order one, but what if it not that?
Any help?
Thanks,
Joe