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The label says 20V and 4.5A, so it's 90W.– David MarshallCommented Aug 10, 2015 at 17:38
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Thanks David, but it used to work fine for more than a year with this power supply, and this cannot be a coincidence this slow down follows this weekend outage incident, is it?– Patrick from NDepend teamCommented Aug 10, 2015 at 17:41
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Next step in diagnosing: Bust out your multimeter and measure the output of your power supply (the 90W) and ensure it's providing proper voltage and amperage (or simply try another known-good compatible power supply).– Ƭᴇcʜιᴇ007Commented Aug 10, 2015 at 18:11
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Does the laptop have Lenovo's 'ThinkPad Power Manager' installed? If so, it may be overriding the Windows power settings.– edgerrrCommented Aug 10, 2015 at 18:51
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@TECHIE007 please read the 3 infos I just added, they all suggest that this is not a Power Suplly issue, notr a hardware issue, but a power setting issue.– Patrick from NDepend teamCommented Aug 10, 2015 at 20:44
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