dell 8200筆記本電源問(wèn)題 老鳥(niǎo)進(jìn)~~!!

在用電源適配器時(shí)每次開(kāi)機顯示
# v& k& k. e8 O4 P8 Ywarning:70 Watt(20V,3.5A)AC adapterdetected. System will not be capable of running in full performance mode without a 90 Watt (20V,4.5A) AC adapter.
Press F1 to continue booting in battery optimized mode,or F2 to shut dowm
按F1可以啟動(dòng)系統但是CPU的頻率從1.8G降到了1.2G電池模式
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  n8 e0 Z2 s% s- |" i" B9 q開(kāi)始懷疑適配器損壞造成輸出電流偏小標值因該20V 4.5A 90WATT  但是筆記本識別為20V 3.5A 70WATT 于是買(mǎi)了個(gè)原裝的90WATT火牛 插上開(kāi)機問(wèn)題依舊. 接著(zhù)判斷為主板BIOS程序問(wèn)題引起功率識別故障 從管網(wǎng)上下載BIOS從A02一直刷到A11還是于是無(wú)補. 最后只能想是主板故障了
于是拆機 主板卸下后發(fā)現在火牛插頭附近的主板有點(diǎn)折痕但是看著(zhù)又沒(méi)斷. 拿出萬(wàn)用表開(kāi)始測量供電引腳連的電感正常 地線(xiàn)也正常  還有個(gè)引腳不知道是做什么用處的  也不知道他跑的路線(xiàn)(因為是多層扳) 無(wú)從下手.后問(wèn)一個(gè)搞維修的說(shuō)此引腳正是電源識別引腳  .

最后在DOOGLE上找到一篇老外的帖子因為是英文看不懂 但應該是解決辦法請達人幫我翻譯下吧  小弟在這里感謝了

I had this problem also, and i stumbled upon a solution that worked for me by mistake.
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" s- v' S) k; ]. v  K+ G& i5 h* n" l5 cHeres the solution that worked for me:
5 ?) I" @: ~$ ?8 t  Z' Ltake a look at your power adapter cord. look at the very tip, the end that connects to the pc. you will notice three little holes. one is centered at the top, the other two are offset to either side below it. notice, the top center, and bottom left each have metal contacts inside, while the third on the bottom right does not. the solution i found was to give power to the third contact on the laptop, the pin that goes into the hole with no contacts. you can test to see if this will work for you before you open up your laptop, using a small piece of wire. use some small copper or silver stranded wire. use about a 1/2 inch piece. the easiest way is to strip back about a half inch of insulation from a wire, twist, and cut the metal strands off at the half inch point. insert one end of the wire into the top center hole of your adapter plug. bend it over, and insert the other end into the bottom right hole (the one with no contacts). this will effectively create a bridge between the two contacts. plug in your adapter to a wall outlet, and then plug it into your laptop. power the laptop on, and your "70 watt ac adapter detected" message should be gone. if it isnt, try unplugging, and moving your wire bridge around a little bit, maybe it isnt making contact to the laptop's power pins when you plug it in. if you're sure that the pins are making good contact, and it still doesnt work, then this solution probably wont work for you. try purchasing one of the "power boards" listed above. if this did work, then move on to the next part to fix it permenatly.

/ |# F  ?* V( N; t: l) z7 [1 RPermenant Fix:
$ |& h3 A$ a, j( p7 q$ dyou will need access to a soldering iron, and some solder. you will also need to dissasemble your laptop. start out by unscrewing the four screws on the bottom marked (K). this will allow you to detach the keyboard. once the screws are out, open your laptop screen as far back as it will go. remove the power button and LED pannel cover. it just snaps out. apply even pressure to both sides at once as you pull it up. you may need the help of a small flat-head screwdriver to get it started. once this is removed, your keyboard should lift up on the right side, and slide out to the right. detatch the keyboard wires at the motherboard (it just pulls up and unplugs) and set the keyboard aside. next, use a small flat-head screwdriver on the heatsink retainer clip to remove the heatsink. Your heatsink is all those copper fins in the top right, by the fans, connected by a heat tube to the block. behind the fins, on the power jack, is where we need to gain access. once the clip is opened up, remove the heatsink. you should now be able to see the rear side of the power jack. notice the three vertical metal strips on the back: these lead to the pins that go into your power adapter. Just as you jumped the adapter plug with the wire, youre going to jump the leads on the jack with solder. if you're not comfortable doing this, have someone who is do it for you. You need to jump the center and right pins together. plug in your soldering iron, and get to work. i'm sure you know how to solder something. once your soldering is complete, replace the heatsink, and snap the retaining clip back down. put the power button and LED cover back on to test. plug your power adapter in, and press the power button. as before when you used the wire bridge, the "70 watt detected" message should be gone. if it is not, your solder isnt making good enough contact. if it is, replace your keyboard and screws, and your laptop is now fixed.

if this solution worked for you, email me and let me know. I'd like you to send me a post card of where you live for sharing this knowledge with you

好帖子大家一定要回哦！

我可以翻譯，但太長(cháng)了，還有需要的嗎