Hikvision FW update fail. How to fix ?

Dear all,

I upgrade hikvision camera model : DS-2DF7274-AEL. After I uploading file via browser finish It's fail and I can't fine IP address any more.

I try to use TFTP to upgrade my camera. The camera didn't reboot after upgrade. I can ping and access the camera via telnet, but no access via web. After rebooting the camera I can't ping or telnet. It's just keep rebooting.

On this camera it have reset button that restore to factory setting or not ?

So Please suggest me how to fix or restore firmware on this issue.

Please reply me asap. Thank you.

Best Regards,

Earth