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I have a 20pin power supply adapter that reduceses to a(p8) 6wire&(p9)6wire plug that plugs into the mother board of my system.

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Understandable.

A 20-pin ATX main power cable, is converted into two 6-pin AT main power cables, by that adapter.

20-pin ATX main power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

6-pin AT main power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#oldpc


As I'm sure you are aware, the color code of the insulation of those power wires, deems what Voltage they are.

Let's look at charts that compare the older AT main power cable connector, and power wires, to the newer ATX main power cable, and it's power wires,

http://en.wikipedia.org/wiki/Computer_power_supply

Scroll towards the bottom of the page, and look at the comparison charts under the heading - Wiring Diagrams

Now if you would, post back in a Comment, as to what the actual problem is.


Posted on Aug 01, 2010

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laptops have power supplys that can lock up
the power adapters conectors break all the time 
and the batterys are designed to be "con$umable$" 
so 

- - -- - -- - -power reset - - -- - -- - -- - -
remove the power adapter's wall plug & 
leave the power adapter plugged into the computer 
but pull the laptop battery out of the laptop.
press the power button just like you are trying to start it 
but press it longer, this will drain & reset 
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-- - -- - -power adapter only test - - -- - -- - - 
reconnect the power adapter's wall plug 
press the power button to start it with just the power adapter , 
If the power adapter starts the laptop on its own go down to  
"If the computer can be started"

If the power adapter does not start the laptop on its own 
leave the power adapter plugged into the computer but 
remove the power adapter's wall plug & press the power button 
just like you are trying to start it again, 
then relese the button 

- - -- - - battery only test - - -- - -- - - 
unplug the power adapter & put the battery back in  
press the power button to start it with just the battery

if the battery starts it on its own go down to 
"If the computer can be started"

if the battery ALMOST starts it on its own 
DO NOT BUY A NEW ONE! it may only be discharged 
locate another laptop just like yours and charge it, 
and yes this is crazy and yes i am sorry!.

- - - - - - - - - - - - - - - - - - - - - - -
- if your laptop computer cannot start at all - 
- - - - - - - - - - - - - - - - - - - - - - -

this can be caused by a bad; 
connector ($5-$60), power adapter($5-$60), 
battery ($70), internal supply ($40-$90), 
or main/mother board ($100-$300)

If the internal power supply is bad or if the 
power conector fails at random (intermitant) 
most of the cost is determined by how dificult 
finding parts and dismantling the laptop is 
and if it's external or internal 


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