The DVR was getting safe because of overheating : the CPU fan was dead. Before dismantling, I thought it was the 12V transformer 2A which was defective, because it really warmed a lot (burning). I bought a transformer from another brand, but same problem. I disassembled and realized that it was the fan, which I changed. After reassembly, the HDD was not detected, it did not turn. After checking on the manual, the HDD may lack power to start. So I handed over the old transformer, the original one, and the HDD was working.

Please help.

I didn't find the right solution from the Internet.


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