Lenovo S660 Service Manual page 16

BB-5 Can not display (畫面無法顯示或顯示異常)
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1. Check J904 soldering condition (確認J904是否有異狀[鍚短 or 空焊]?)
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2. Replace LCD (更換LCM)
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If failure still exists after LCM replacement (若更換良品後，現象還存在)
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3. Check L1202 L1203 L1204 condition (檢查L1202, L1203, L1204否有異狀?)
• 4. Check if LCM voltage (VIO28_PMU及VIO18_PMU) are correct (確認LCM 電壓
(VIO28_PMU及VIO18_PMU)位準是否正確?)
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5. Check U901, L901, D901, R903 if back light is in failure (若無背光,確認U901,
L901, D901, R903)
LCM兩組 作電壓
Company confidential 16