11-25-2014 05:49 AM - edited 03-17-2019 01:05 AM
When i blug in cable this Phone 7975 ,the display lights white for second and then keys (headset,mute,speaker) lights up in sequence .This process repeats and repeats .
11-25-2014 05:59 AM
Try a factory reset as per the following
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/7975G_7971g-ge_7970g_7965g_7945g/9_0/english/admin_guide/P747_BK_W06BD6D9_00_adminguide_7945-7965-7970-7971-7975/P747_BK_W06BD6D9_00_adminguide_7945-7965-7970-7971-7975_chapter_01001.html#P747_TK_P90391D3_00
If the issue persists, the phone will need to be replaced.
HTH
Manish
11-25-2014 06:00 AM
You could try a factory reset but this doesn't sound like it's a good sign. Try to blow out everything but the CNU on the phone.
Hold down # at the start then after the lights flash and you get the bouncing amber lights press:
3491672850*#
11-25-2014 06:43 AM
I did all of this and there no action ,the same isuue appear to me
11-25-2014 06:52 AM
The phone needs replaced then. Isn't much any of us can do at this point.
11-26-2014 01:17 AM
Tell me what is the describtion of this issue ...should i report cisco to replace this Phone .
11-26-2014 01:22 AM
If the phone still does not boot up after a factory reset then please get it replaced if it is under warranty.
Manish
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