MAXA BDLM26A2 - 8.2.4 F1;F2 Malfunction

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8.2.4. F1/F2 Malfunction
C5 is displayed on the unit.
Is there jumper cap on the mainbaord? Install a matching jumper cap.
Is the jumper cap inserted incorrectly or improperly?
Is the malfunction eliminated?
Replace the jumper cap
Is the malfunction eliminated?
The mainboard is defined abnormal; replace it
End
Re-insert the jumper cap.
Is the malfunction eliminated?
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
The jumper cap