About 5 years old, installed Energiser Industrial AAA batteries which are the same as the original batteries installed. Contacts are clean with no sign of corrosion. Problem just started. Phone works but some function like line in use if another extension is used does not light up. Also memory does not retain if power lost.
Just had a good look. Contacts are shiny clean and springs hold all batteries tight in the socket, need to use a screwdriver to push battery against spring to remove cannot pull them out with fingers. When pushed in the pip on the +ve end of the battery snaps into place.
Yes they are brand new batteries and test good with a Fluke 97 DVM. I have actually tried two sets of batteries as I thought they may be dropping when loaded but with same result. I measure 6.15 V across the pack when inserted into the phone, measured on the phone contacts.
I can just shop around for another one that has the features I want. I was hoping you would know a key sequence to clear this error. I will give RCA support a call and if no joy will open phone to check internal connections. If it is internal failure it would likely not be cost effective to repair.
I service high end CT & MRI systems in hospitals all over so am very familiar with electronics. But most devices have hidden codes to reset stuff these days which is great if you can find the code. If this phone does not have that then it must have failed or have a loose internal connection.
I found a similar phone model 25214RE1 at Staples for $80.00. Not worth going with used.