Acer AL1751 - Page 33

33
2. No picture (LED is orange)
No picture
OK
OK
NG
NG
X401 oscillate waveform
is normal
Replace X401
Check if the sync signal from
computer is output and video
cable is connected normally
Input the sync signal of computer,
or change the cable
Replace U401
NG
OK
Key is under control?
X402 oscillate waveform
is normal
Replace U402
Replace X402
OK
Replace U401
NG
NG