BenQ M2400HD Service Manual - Page 47
Main Board, No Power
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UPC - 840046015916
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24" LCD Color Monitor Main Board (1) No Power BenQ E2400HD No power Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100-240V is normal NG OK Reinsert or check the power section Check if the Pin 3, 4 of CN701 are 5V input NG Check power board OK Measure U701 Pin2=3.3V, U702 Pin2=1.8V NG OK Replace U701, U702 Check if X401 oscillate waveforms are normal NG OK Replace X401 Check U401 47
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24” LCD Color Monitor
BenQ E2400HD
47
Main Board
(1) No Power
No power
Press power key and look if the
picture is normal
Please reinsert and make sure the
AC of 100-240V is normal
Reinsert or check the
power section
Check if X401 oscillate waveforms are normal
Measure U701 Pin2=3.3V, U702 Pin2=1.8V
OK
OK
NG
NG
NG
Replace U701, U702
Check U401
Replace X401
OK
NG
Check if the Pin 3, 4 of CN701 are 5V input
Check power board
NG
OK