got a laptop that wont power on

FOX · Posted: Mon, 26 Feb 2007 17:17:42 Post Subject: got a laptop that wont power on

my buddy gave me an old p3 sony laptop that wont power on... i want to use it in my car for diagnostics and such

the issue is that it wont turn on as the title states. i tested the power supply and its running the proper voltage but it is a universal one

when i plug it in to the laptop no lights come on or anything. it also has a dock and when i plug in the dock same thing. so, either both the dock and the laptop are bad something is f-ed on the power supply or could the battery be bad? i have a really old skool one that has a bad battery but it still lights up when i plug it in...

any thoughts?

its a sony vaio pcg r505jl

T-shirt · Posted: Mon, 26 Feb 2007 18:24:55 Post Subject:

Even with a non-working battery, if the power brick is getting the right polarity and voltage to it, it should work.
Since you don't get any lights or any sort of startup/spinup action, i'm guessing it's a NO power, or something is really fried inside.
I'd open it up a look (starting at the power inlet jack) for fuses/CB's or burnt/broken ( or missing)components
with a multimeter you should be able to figure out how far the power is getting.
Another possiblity is the power on switch is broken, or the power down when close switch is stuck/thinking it's closed

FOX · Posted: Mon, 26 Feb 2007 18:40:07 Post Subject:

its just weird to me though that neither the dock plugged in seperatly or the computer light up at all so its like both parts are bad... ill open it up right now though Smile

i like doing that stuff lol

FOX · Posted: Mon, 26 Feb 2007 21:15:36 Post Subject:

took it apart everything looked fine but something is wrong... i got another power supply and still nothing so im thinking its a bad mobo....

mrweasel · Posted: Wed, 07 Mar 2007 15:51:04 Post Subject:

you don't have the dead battery in it do you?

I remember some older Dells that wouldn't boot if the battery was bad.

FOX · Posted: Wed, 07 Mar 2007 18:26:06 Post Subject:

it might be that but i dont have any way to test it unfortunently... i dont wanna spend 50 bux either if thats not the issue lol... its just weird though that neither the dock or system wont show the power light when theyre plugged in seperatly

mrweasel · Posted: Wed, 07 Mar 2007 19:01:14 Post Subject:

just pull the battery, if it turns on that was it. If not, probably the motherboard

FOX · Posted: Wed, 07 Mar 2007 22:32:52 Post Subject:

yea same thing so that sux lol

mrweasel · Posted: Thu, 08 Mar 2007 10:20:31 Post Subject:

do Sony's have any diag lights? I know if there's a bad component, Dells used to flash a series of lights so you could figure out which part was bad.

It's been forever and a day since I touched a Sony lappy

FOX · Posted: Thu, 08 Mar 2007 14:03:43 Post Subject:

nothing lights up at all on this one and the power supply is good bc i tested it