ATT 9357 in use light light keeps flashing

Unplug the base and remove the handset battery for a couple of minutes. The only thing I can find on the lamp flashing is on page 7 of this manual

Thanks for the response.

I will try unplugging it from the power; I pulled the battery earlier for over 2 days and the same issue occurred; flashing blinker.

I will now unplug the phone and battery again and will get back with you tomorrow.

Thanks again

Thanks for the idea, but it not work.

If there are any other thoughts out there place let me know.

Thanks again to all.

See re-initializing the handset and base: on page 20. There's nothing in the manual that directly addresses your issue. 

Thanks again.

I went to page 20 of the PDF and it shows how to Call screening/intercept, Record a memo and message window display. I looked though the PDF and saw no mention of re-initializing the handset and base:

That would make sense, but in that document it was no mentioned.

This system does not come with additional phones.

When I originally purchased the system, I plugged the phone to the wall and AC outlet and it started working.

Would you please be so kind as the copy / paste the procedure that you saw and I will try it.

Thanks again.

My apologies page 25

Thanks,

I have a couple other task ahead of this; I am writing just to let you know I have not forgotten. I will write when I get to this task again.

Thanks

No problem. I don't have a high level of confidence that will fix it. If it doesn't it's most likely the base. Just out of curiosity what service are you using?

I did this in the past and it still did not work:

If the above suggestions don’t solve the problem, try re-initializing
the handset and base:
1 Disconnect the power to the base.
2 Remove the handset battery pack.
3 Wait a few minutes.
4 Connect the power to the base.
5 Insert the handset battery pack.
6 Put the handset in the base to re-initialize.

Any other suggestions?

My guess would be the base is bad or it's something in your service.