Acer service manual Troubleshooting, No Power & LED Off, Acer -LCD-H243H, Ng Ng

Acer Acer –LCD-H243H

04Troubleshooting

4.1No Power & LED Off

Unstable power

Check sampling

Circuit

Check the R pin voltage of IC803 about 2.5V

yes

NG

NG

Check F801,

R808,R806

Check the C pin voltage of IC803 if 3V

NG

Check R832,IC801

NG

Change F801, R808,R806

Change

IC803

Check pin6 of IC802 voltage is 14V

NG

Check FB801,D803,C8 07,C810 if short

yes

Check pin2 of IC802 voltage above 0.85V

yes

Change

FB801,D803,C807,

C810

NG	Change R815, R 809, R848,
	R 849, R850,R851,C809,

END

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