Why the Text of the Fresenius dialysis machine 4008S ’s LCD be twisting?

Dialysis engineer A:
Why the Text of the Fresenius dialysis machine 4008S ’s LCD be twisting?

Dialysis engineer B:

Does the Voltage have some issue?
Are there any other electronic facility nearby to affect the Fresenius dialysis machine 4008S?

Dialysis engineer A:
We did not test the Fresenius machine’s Voltage, this Fresenius dialysis machine is a second-hand machine.

The Test has been twisting for long time
Dialysis engineer B:
To change the board
Drive board
LCD drive board
I suggest to clean the dust frist.
Dialysis engineer A:
The doctor in Dialysis center also suggest to clean the dust firstly.
Dialysis engineer B:
To Clean the dust , to pull the wire board, to change the drive board.
Great
Dialysis engineer A:
Good teacher！

Dialysis engineer B:
Any issue on dialysis machine LCD is concerning two parts, the LCD and the drive board.

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