Acer AL2423W AL2423W LCD Monitor - Page 40

Acer AL2423W Manual

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1. No Power No Power Chapter 4 Change NO Power Board No Check Short Of Main Board NO Change U13,U12 NO Change X1 or U4 NO Change U7 or Change U7 RUN Software ISP Yes Check CN7 +12V and +5V Yes Check U13=1.8V U12=3.3V Yes Check X1=14.318MHz Yes Check U8 Pin 1,2,5,6 Clock Yes Check Key Board NO Change Key Board - 40 -

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- 40 -
Chapter 4
1. No Power
No Power
Check CN7
+12V and +5V
Yes
Change
Power Board
NO
Check U13=1.8V
U12=3.3V
Change
U13,U12
NO
Check Short Of
Main Board
No
Yes
Check
X1=14.318MHz
NO
Change X1 or
U4
Yes
Check U8 Pin
1,2,5,6 Clock
NO
Change U7 or
RUN Software
ISP
Change U7
Yes
Check Key
Board
Yes
Change Key
Board
NO