Solved

Latitude D810 Power Issue

Posted on 2009-06-30
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Last Modified: 2013-11-17
I have an issue with a Dell Latitude D810 that will not even let it boot up to the BIOS.

My manager wanted to check to see what software was on the laptop (its a spare laptop in the office) so he grabbed the laptop and decided to plug it in with a power adapter from a Latitude D520. He claims that the D810 booted up fine and he checked the software on the system and was about to shut it down but then got a warning about the battery and it shut down on its own. Now I wasn't in the office to actually witness what really happened so I don't know the truth of what he told me but all I know now is that the laptop doesn't work and its warranty just expired in February of 2009.

Basically when the power button is pressed the power light, num lock and caps lock lights turn on and it continues to run for about 8 seconds and then just turns off. There is never anything displayed on the screen at all and no other activity from the hard drive or battery lights. There is also a slight clicking noise that is heard within the 8 seconds the laptop is on. The result is the same whether the laptop is plugged in and the battery is in the laptop or not however the laptop does absolutely nothing when it is just on battery.

I have heard that damage can be caused if the wrong power adapter is used but I have never seen it first hand. However, I was under the impression that it would just be limited to damaging the battery by over or under charging it at an incorrect voltage. Does anyone know of anything to do to try and troubleshoot this?
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Question by:J-Reese
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by:Joseph Daly
ID: 24747196
Have you tried it with a power supply from the actual D810. If I recall correcly some of the power supplies for these laptops are 65w and some are 90w. It may need the more powerful power supply to boot up correclty.

I have never seen any damage to a laptop by using the wrong wattage power supply. The worst I have seen is that it will give you an error message on bootup.
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by:J-Reese
ID: 24747427
I am actually working on the system with the orginal D810 power adapter. It is a 90w power adapter where as the D520  is a 65w power adapter.
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by:Joseph Daly
ID: 24747495
Tried removing the battery and powerup only with the power brick?
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by:J-Reese
ID: 24747784
Yes, that is when it runs for 8 seconds and then shuts off. If I have the battery installed it does not turn on at all.
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J-Reese earned 0 total points
ID: 24749263
Well even though the laptop is out of warranty I decided to give Dell Support a call anyway. After some brief troubleshooting their diagnoses is that the power circuits on the motherboard are damaged and the motherboard would need to be replaced. Supposedly this can happen because of the amperage of different power adapters. The 65w power adapter is not too much for the laptop but it is too little and trying to run the laptop with the lower power adapter it thinks that it is plugged in so it is trying to draw the normal current that it would from the 90w power adapter but the adapter really isn't supplying enough to both charge the battery and run the system so the power circuits get overworked and burn up. Very interesting...

So with a quote of $386 on a refurbished board this will now be used for parts.
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