Error solution NO POWER （no display）

Trouble shooting procedure
Check fuse.
Check impedance of rectifier bridge:2.1M; supply power by 80V isolation transformer, the voltage of rectifier bridge’s +、- sides is around 120V; The impedance of Q3~Q8（IGBT）：10K
Check impedance of T2’s output voltage: C79:around 1.7M; voltage: around:8V; Impedance between foot 3 and foot2 of U24:3.6K; voltage: around 5 V; C3: around 46Ω; Voltage: around 5.2V; C5:0.6K; voltage:3.3V; C38:1.6M; voltage:15V
Check C37 on main board: (check impedance between foot 1,foot2,foot 3,foot 5 and foot 8(ground) to make sure whether it is in short circuit)
Check C30 on main board: (check impedance between foot 1,foot4,foot 6,foot 8 and foot 5(ground) to make sure whether it is in short circuit)
Remove U30, supply power by 80V isolation transformer, check whether it is normal for rectifier bridge’s output and the voltage of C38.
If need to check 27 voltage, raise one side of R102, upply power by 80V isolation transformer, test R53 two sides, if the voltage is 27V, is means T1 is working.