Acer A221HQV - Power Board Troubleshooting; No Power

5. Troubleshooting (continued)
5.4 Power board troubleshooting(1A1D1H/1A1D/1A):
5.4.1 No Power (1A1D1H/1A1D/1A):
Check output voltage +5V, +22V are right or not
NG
OK
Check power switch is turn on or not
Check power cord (P802), signal cable (P302), P802,
P103, P104 are connected right or not
Check pin 5 of I801 have same pulse or not
Check pin 1 of T802 have same pulse or not
Check peak voltage of R811 triangle pulse is under 0.8
volt or not
Check feedback circuit around I802, I803 and the other
components and repair them
It is not power board problem
Turn switch on
Check F801, D801, P802 and repair
them
Check R807, D804, I801 and repair
them
Check peripheral component of I801
and repair them
Check Q803, R813, R814, D806
R811, R815 and repair them
Check D804, R807 R811and repair
them
Repair them
OK
NG
OK
NG
Connect it right
OK
NG
OK
NG
Check C807 is over 17V or not
OK NG
OK
NG
OK NG
Check D809, C822, C823. C824, D820, C818, T802 have
same short circuit or the output +5V and+22V are over
load
Check C805 is about DC126V-380V or not
OK
NG
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ACER A211H/A221HQ