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20金幣
接修一臺T40筆記本,按開(kāi)機,剛開(kāi)始能跳到1.2A,但是不能開(kāi)機,拆機,測各電感對地阻值,電壓,電壓正常,都有輸出,再接可調電源,呀,待機緩慢升到0.6A~0.7a 測各電感電壓也正常,手摸全板,網(wǎng)卡與南橋有點(diǎn)發(fā)燙,拆下bga Intel 82540EP網(wǎng)卡芯片,待機0.02A,正常,開(kāi)機,能正常顯示,以為芯片壞,換個(gè),還是待機緩慢升到0.6A~0.7a,測網(wǎng)卡、南橋供電,外圍電子元器件,沒(méi)有發(fā)現短路問(wèn)題,(3.3V待機電感正反對地阻值均為045,這個(gè)對嗎?)另能燒雞法,燒3.3V待機電感,南橋有點(diǎn)點(diǎn)發(fā)燙,其余未見(jiàn)問(wèn)題!
' \6 k# y/ v9 L現求各高手說(shuō)下思路,或哪位同行修到此故障現象。不勝感激。) ~' X/ c i) p( A, K
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