DVR does not store new settings & DVR Firmware upgrade failed

Joined
Jan 2, 2019
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Location
Saharsa, Bihar, India
DS-7208HGHI-E1 series dvr does not store any settings like record settings etc. when we try to upgrade the firm ware its takes everything and reboot but firmware does not upgrade.
Also as per many post we try to Putty and USB based firmware update through console. Its load the firmware but in last display message Update check failed and retry download. This process goes to three times and again go to prompt.
Please suject us like bricking etc.
 
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