T56A does not boot

[Joseph1823]

Hi!

I installed a couple of T56As last week and today one of them does not boot. The only thing one sees is that the LED on top is flashing roughly every 10 seconds. Cabling etc, seems to be OK.

Does someone have any idea what the problem could be?

[Evan_Yealink]

Dear Joseph,

​This is Evan from Yealink Support Team, I am glad to answer this question for you!

For the issue you reported, I think it may be a hardware problem. For the RMA request , we hope you understand that we need to double check whether it is hardware issue before we start the RMA process for you .

1. Please change an adapter or POE for exchange testing.
2. Please make a small video about this issue, and upload it to our file server via below link:
http://sfyms.yealink.com/?ShareToken=D89...D0BDC2AEF6

Any update, please let me know.

Best Regards,
Evan You

Note: To Provide better technical support Service and best support experience, Yealink decide to open Yealink Ticket system service (https://ticket.yealink.com)to Yealink customers.Please following this guide http://support.yealink.com/faq/faqInfo?id=678 to Register and enjoy Yealink Ticketing Service.

[Joseph1823]

Hi Evan!

The customer has sent it back to me. It takes 1 or 2 days to check the phone. I've also received the recovery image from the distributor in case the phone boots so far that I can enter the tftp's server address.

[Evan_Yealink]

(04-09-2018 05:57 PM)Joseph1823 Wrote:  Hi Evan!

The customer has sent it back to me. It takes 1 or 2 days to check the phone. I've also received the recovery image from the distributor in case the phone boots so far that I can enter the tftp's server address.

Hi Joseph,

Please have a try with the recovery mode. If not help, I think it is a hardware problem.

Any update, please let me know.

Best Regards,
Evan You

[Joseph1823]

Hi Evan!

I uploaded a small video, where we connect the phone to a POE switch 2 times. There's also another phone on the switch and that works. I also added some info about the serial number.

I noticed only a single small red flash. Nothing more, so I didn't have the chance to specify a tftp server.

[Evan_Yealink]

(04-10-2018 12:56 PM)Joseph1823 Wrote:  Hi Evan!

I uploaded a small video, where we connect the phone to a POE switch 2 times. There's also another phone on the switch and that works. I also added some info about the serial number.

I noticed only a single small red flash. Nothing more, so I didn't have the chance to specify a tftp server.

Hi Joseph,

I have watched the video you provided. It is confirmed hardware issue. Please contact your distributor for warranty service.

Please let me know if anything we could help!

Best Regards,
Evan You