Alienware no power

arges86 · Jul 13, 2014

Trying to troubleshoot a friends Alienware laptop.
no power, lights, fans, ect.
Replaced the mobo and still nothing.
The power supply puts out 19.3 volts (units says its 19.6). I don't know if this could be an issue or is withing the range of the psu.
There is no power out the back of the adapter where it is soldiered to the motherboard either.
I've tried taking each part out in succession to see if there is a change and nothing so far.
Any ideas would be appreciated.

jarotech · Jul 13, 2014

Hi, if you have a new motherboard and you have the same problem, then the adapter is defective.

arges86 · Jul 13, 2014

Would a dead CPU cause it to not power on at all?

MotherboardHelp · Jul 13, 2014

Hi, if the cpu was shorted, it could cause the motherboard to cut off the power and ie small board housing the power socket, or problem with the socket. The differencies in voltsge that you mentioned won't play any role here. First and foremost, what is the model number of the laptop?

MotherboardHelp · Jul 13, 2014

Some lines of my previous post got deleted somehow. Anyway, depending on the model number of the laptop the design is different and also daughter boards or power socket itself can be defective.

arges86 · Jul 14, 2014

Its an Alienware P08G
http

/www.dell.com/support/home/us/en/19/product-support/product/alienware-m15x/manuals
With an i5-580M

jarotech · Jul 14, 2014

arges86 :

Yes, but you said you have no power, lights, fans. And an important point, is you said you have no power out the back of the adapter meaning the DC jack. That means your adapter is defective.

MotherboardHelp · Jul 14, 2014

I imagine your power supply is giving power as you measured the voltage. Can you confirm this? Have you checked if power goes past the power jack and the power board supplying the mother board? Also, in this model you have to connect keyboard and touchpad, otherwise the power won't be passed on to the motherboard's components.

arges86 · Jul 15, 2014

MotherboardHelp :

I can't believe it.
I've been stressing about this laptop for days trying to figure out why it won't turn on.
Never thought to plug in the touchpad cable (to be fair, its really small and hard to plug in).
I plugged in the touchpad, along w/ the keyboard, ect. and the damn thing powered right up.

MotherboardHelp, where did you learn that piece of information?

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