Acer AL1713bm, Service Manual

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26
TROUBLESHOOTING
1. Common Acknowledge
If you change the M/B, Please re-do “DDC” programmed &”Auto Color balance”
If Replace “Power & Inverter board” only, please re-do “Auto color balance”.
If you adjust clock and phase, please do it at condition of Windows shut down pattern.
If you confirm the R.G.B. color is normal or not, please do it under 16-grey scalar pattern.
This LCM is analog interface. So if the entire screen is an abnormal color that means the problem
happen in the analog circuit part, if only some scale appears abnormal color that stand the problem
happen in the digital circuit part.
If you check the H/V position, please use the crosshatch pattern.
This LCM support 20 timing modes, if the input timing mode is out of specification, the picture
appears abnormally.
“Auto Color Balance”- Press “>” and “<” together and plug in AC power cord at the same time at
VGA cable in.
2. Interface Board Troubleshooting
2.1 No Power & Power LED Off
Chapter 4
No Power & Power LED Off
Is the voltage at CN801 Pin8
DC5V?
Is the voltage at U401 #9
DC3V?
Is the voltage at CN201 #2
DC3V?
Change R202
Check Q.P.I.
NO
NO
Check U401
Check X401
YES
YES
YES
YES