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I have an old Inspiron 8200 that has a strange problem. Im hoping someone out there might still be interested or remember any common problems with this ol crapper. It tells me when i boot up with the ac adapter connected that there is a 70 watt ac adapter installed and that i need to have a 90 watt adapter installed or it wont run at full speed. Sure enough it wont get above 1.2Ghz and it has a 1.7Ghz P4-M in it. I just bought a new ac adapter off of ebay and it still does the same thing. I have read that there is an dc power board in this thing that sometimes goes bad. Its $40 and i dont want to replace it if it isnt bad. Has anyone heard of this problem. When i disconnect the ac adapter it goes right up to 1.7 like it should, but it takes forever to charge the battery back up to 100%. I do like this laptop and would really like to get it back up to speed. Thanks for your input!!
 

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It is not a problem, just the way they were made. I have an Inspiron 8200 with a 1.9ghz and remember that detail. It will work with the older lower wattage (70W) ac adapters but only at the slower speed and you need the higher wattage (90W) ac adapter to get the higher speed. It had something to do with the new (at the time) release of the 1.6ghz and up P4-M processors.

The other issue that arose with those laptops was that the on board connector for the AC adapter had a bad solder job. Mine had this problem - thought it was a bad AC power supply so I bought a second one. After time, it gets a little loose and the AC power supply doesn't always work. Sometimes you can wiggle the connector and get it to work, but it's only a temporary fix. I actually had completely disassembled mine to get to the board and I found the connector that was loose. Just added a little solder to it and it works great ever since. It will power just fine through a docking station if you have this problem, as the docking station powers it through a different connector (used this solution for years until I found out that the problem was a bad solder job at the factory).

If you want, I can dig out my laptop in the morning and get the part # off of the AC adapter.

Edit: You can buy a brand new one here http://www.kahlon.com/itemdetailpg.asp?itemid=912790
 
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