Medion B1997PNST Service Manual page 21

5-2 Function Key Abnormal
Troubleshooting
Function Key Abnormal
Check 5V from
I810 regulator?
Yes
Power
ON/OFF again and
check X701, oscillator
OK?
Yes
Check
I701 uC OK?
Yes
Check LED LD701 OK?
Yes
END
MD 1998LE (B1997PNST)
Repair power
No
supply
Replace X701
No
No Replace I701
Replace
No
Q701 or Q702
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