LCD from aliexpress connected to FNIRSI-1013D not working

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LCD from aliexpress connected to FNIRSI-1013D not working
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I have a fnisri 1013D oscilloscope device, I put it down to charge and the screen no longer wants to light up, I don't understand it didn't receive a shock or it fell. I opened it I checked the battery everything is ok the power button works, I don't understand can you help me? can you send me the circuit diagram with the voltages? Do you think it's the screen that's not working?

soufben