Which is which?

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And i have to replace it with this one

Without seeing the other end of the cables there is nothing we can do for you. The easiest way to check this shit would be with a multimeter. But I'm assuming you either don't have one or have no idea how to use it.

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I do not have a multimeter.here is a fu ll picture

For your second picture the outside layer (silver) is usualy the negative one. With the voltages you are dealing I would go with try and error. If you hoock it up the wrong way you will just get a wrong polarity (-12 instead of 12 volts). This is not going to damage your device.

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And the coloured ones?

Red should always be live/positive but 24v uses black and white as positive and negative in some instances.

In this case I would guess
Red: positive
Negative: black
White: sensor/return

Without a multimeter you can't be sure.

On the connector end for your device you need to know the polarity.

Thx for the help it was actually red -positive black-return and white-negative

>>1006498
>>coloured
colored, fixed it for ya

>>1006544
>the rest of the world is wrong, only our one country is right!

>>1006597
Well we did invent the language, no need for you to shit it up.

>>1006599
yeah not falling for that bait. Nice try though.

I did this before, it WILL NOT WORK. Reason is the copper on aluminum its not safe. The outside is negative and inside is positive. As for the colored ones it data meant to measure voltages/watts/amps by an adapter or receiving end of the cable.

>>1006490
get a led from something and a pencil lead
search online on how to identify which is the negative side of the led and how current flows through it. use the pencil lead as a high resistance current limiting for the led

or just take a $5 from your wallet and go get a cheap chink multimeter from the dollar store...

Sorry english is my second language,and it works.

>>1006601
Losing the argument like a champ gg

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>>1006494
Don't know if troll or just idiot. I blew up a laptop by using wrong polarity with one of those shitty universal power supply kits.

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>>1006627
>spend $5
>at the dollar store
>for one item

>>1008624
Don't know if troll or idiot. Only thing that would happen is no electricity flowing. Ever heard of diodes?

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>>1008711
Well apparently my HP was too cheap to use diodes and it would not power on after using wrong polarity. You filthy nigger troll.

red is +19v
black will be 0v(gnd)
white will be sense wire
which usually goes to gnd depending but I might stand corrected on the sense wire.

Black is gnd
Red is positive
Don't connect the white one, it is used in some HP power adapters as a sensor.

>>1009417
I can also confirm plugging dc in backwards doesn't really do anything in main stream electronics. Could have been a 1d10t error perhaps.

>I can also confirm plugging dc in backwards doesn't really do anything in main stream electronics

as someone who repairs electronic devices, i can say that you're about 50% right, meaning there's a 50/50 chance you'll destroy your $600 laptop if you use the wrong polarity.

i wouldnt replace a 3 wire cable with a 2 wire cable. you're gonna have a bad time.

that said, black is - red is + white i dont know, maybe ground but it should have green on it usually.