Arlo Pro camera won't sync, strange lights sequence

[jcrain]

I recently had 2 out of my 8 cameras battery go flat (Cam1 and Cam2). After charging them both, I noticed that Cam1 would not come back online, the app said it was offline constantly. Cam2 was fine. I suspected a dead battery, so I swapped the batteries and sure enough Cam1 came back online. As expected, Cam2 went offline, confirming my thoughts that the battery was the problem.

However,  I used a multi-meter to check both batteries and they are both fully charged, registering just over 8 volts each, yet Cam2 still wouldn't come back online. 

So to do a double-check, I swapped the batteries over again, expecting  Cam2 to come back up, and Cam1 to go off-line again. Here's the weird thing: Nothing changed. Cam1 still worked, but Cam2 with the original "good" battery, still won't work.

Next step: I have removed Cam2 from my account in an attempt to resync, but I cannot do it. Here's what I get:

• Cord plugged, power on - Quick blue light, then nothing. After a while, solid blue light.
• Cord plugged in, power off - Quick amber light, then nothing.
• Take out battery and re-insert - blue light for approx 2 secs, then nothing.
• Press and hold sync button - Nothing. No lights, app or web browser doesn't see the camera.

I've tried all the typical reset process (power-cycle base etc.) but can't get the camera to come back to life or be discovered by the network. Putting any battery in Cam2 has no effect. I get a blue light for 2 secs, then nothing.

It's strange how the problem originated in a different camera, and then seemingly transferred to this one? Weird!

[jguerdat]

I'd start by cleaning the battery contacts on both the batteries and cameras. If that doesn't help, remove and resync the cameras.

[jcrain]

THanks, the battery is charged and the contacts are clean. The issue is the Sync button has no effect. Doesn't matter if I press it momentarily or hold it down, nothing happens. 

I've tried using both the phone app and web browser to re-connect and sync the camera but it stays invisible.

[jcrain]

I found this thread, describes exactly the same issue but I don't know what the outcome was.

https://community.arlo.com/t5/Arlo-Pro/Arlo-Pro-Camera-bricked-after-firmware-update/m-p/1647997

All help welcome.