If the system says or "Wrong Version" , do not force it. This means you downloaded the wrong firmware for your specific chipset.
A: No. Even if the chipset looks similar, the bootloader parameters differ. Only use files explicitly labeled for "XVR4A08." dh-xvr4a08 firmware download
The technical team inserted the USB drive into the DVR and initiated the firmware upgrade process. The device took a few minutes to complete the update, during which it rebooted several times. Finally, the DVR powered on, displaying the familiar interface. If the system says or "Wrong Version" , do not force it
Firmware Download for Dahua DH-XVR4A08