BenQ M2700HD, Service Manual, Page: 50 / 53

49
Output power is unstable
Unstable power
Check sampling
Circuit
Check R827,
R829, R830,
repair R827, R829,
R830 R833
Check the R pin
voltage of IC804
Check R826, R828
Check D813 ,C823 if
short
Change D813 C823
Check pin2
of IC806
Check pin5 of
IC806 voltage
below 1.4V
Check R845, R846,
R849, R852,R853,
END
Check the C
pin voltage of
IC804 if 3V
Change
IC803