Sorry I'm posting this here but I"ve tried posting to the Insteon Forum and it won't let me log in or reset my credentials. The latest posts there seem to be over a year old so maybe that site is no longer working?

This is a strange problem. I’ve been an Insteon user for over 20 years and use an Eisy controller (ver. 1) and over 20 Insteon devices.  On 11/5/2026 my internet service went out (cut cable).  While I waited for it to be repaired, I tethered my phone to my router for a while to get internet access going again.  It worked OK, but was up and down several times during the day as I messed with it.

That evening I noticed that my 6-button keypad was “flashing”.  The top button was on because the lights it controls were on. There were 1 or 2 of the small scene buttons lit up because those scenes were on at the time.  All the LEDs were steadily flashing on-off about once or twice a second.  The buttons still seemed to control their loads when I pressed them, yet whatever ones were lit up at the time would flash, no matter what I pressed.

I had no idea what was happening, so I just ignored it and went to bed.  The next morning the LEDs were no longer flashing and the keypad seemed back to normal. 

Today, 3 days later, the keypad is turning on and off loads normally (and not flashing).  However, when I turn on the top button it lights up, goes dark, and lights up again. I’ve never experienced that before.

Does anybody know why:

a) My internet going out would affect the keypad?  Sure, the Eisy complained it was offline and online, but that’s normal.
b) What does the flashing LEDs signify?  Is the EISY and/or PLM doing this, or the keypad itself?
c) Why does the top button now turn on/off/on every time I push it?
d) Do I need to factory reset the KPL and reprogram it?

Thanks.

Have you tried rebooting it? Pull the air gap for like a min and then throw it back in….see if that changes the behavior? This thread has a lot of good troubleshooting advice as well:

I'd do a restore device on it.

I tried rebooting it, twice. First time, off for 10 seconds, second time off for 30. Didn't help. Really erratic behavior. Sometimes it does the blinking thing, sometimes it doesn't, depending on what button I push. I swear at one point I just waved my hand over the KPL (really close, without physically touching it) it blinked off and on again.

I finally did a factory reset on it and now it seems to be working OK. I almost thought the switch was failing and would have to be replaced.

I have no idea how this could be related to my network going down and up, unless the Eisy did something weird. I have it on a UPS, so it didn't get powered off. It did send me notifications that the portal was inaccessible, so it knew the WAN was down. I don't know... another Insteon oddity I guess.

I relinked the top and bottom buttons to the Insteon on/off switch they normally control at the bottom of the stairs. Can I reprogram the four small scene buttons using the Admin Console?

I've had a number of keypadlinc versions in the past, and what you're describing is "a thing" for them. IMO the keypadlinc is the most complex of all Insteon switches and some quirks come along for the ride sometimes.

I had an 8 button at a doorwall, just to the left of a computer desk in the kitchen. I'd be sitting at the computer and randomly, for no reason, the middle for buttons would flash in unison, then stop, It did not matter what state the buttons were in. It still functioned properly. Thankfully I was the only one that caught it happening.

I don't think it was all of my KPLs, but I had to be there at the right time. Most of mine were at access areas like stairwells where I don't spend a lot of time, so I really don't know.

I was never able to run down what causes it. Logs were clean, nothing found in the event viewer. The only option other than factory reset/restore is replacing it.

Actually, Paul's post reminds me of an interesting thing that happened in one of my keypadlincs a number of months ago: it's backlight would blink in sync with any Insteon powerline signals. I posted about it a the time. A factory reset and device restore fixed it, and it's been fine ever since.

Alas the funky KPL is funky again today. I turn on the top button, the button lights up, the load turns on, but then the button blinks off and back on. Sometimes it blinks 2 or 3 times.

I have another (identical) KPL in another part of the house that is working fine, so I compared it. On that one the "set" button flashes green whenever I tap one of the buttons. That's how they normally work. On the suspect KPL the set button never blinks. I thought it seemed odd when I did the factory reset yesterday and re-linked it to its secondary switch. The set switch never lit up.

So I think I will have to consider the KPL as failing and replace it.