What is the reason why the barcode printer power light does not light up?

What is the reason why the barcode printer power light does not light up? Let me tell you below by Xiaobian.

1: Is there still power supply in the power socket (note that the 110V/220V voltage is correct)

2: Check if the power cord is plugged in

3: Is the power cord turned on?

4: Turn on the machine and check if the fuse on the motherboard is burnt. If yes, please replace it.

5: Is the LED light completely off, or there is a flash?

6: Is FLASHMEMORY plugged in?

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