Acer AL1713 Manuel d'entretien - Page 27

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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

No Power & Power LED Off

YES

Is the voltage at CN801 Pin8

DC5V?

YES

Is the voltage at U401 #9

DC3V?

YES

Is the voltage at CN201 #2

DC3V?

YES

Change R202

Chapter 4

Check Q.P.I.

Check U401

Check X401