Laptop / Power or motherboard ?

Thinktank · 12th April 2005, 3:59 PM

Heres the story.

I Own a compaq presario 700,

Problem : i have NO power at all running through the laptop , with or without a battery , with or without the AC adapter , when i press the power button , NOTHING happens. no lights , no other indication, just plain old dead.

Is it the power supply , or could it be the motherboard?

EDIT : If this post is in the wrong section please move MODS.

psylink · 13th April 2005, 2:09 AM

It could be either. If your game, open up the laptop and check around the power socket that its still connected. My last presario's power socket had detatched itself from the motherboard and wouldn't allow power to work. 1x new battery, 1x new power adapter and a few bits and pieces from jaycar and i had it figured out

Hope that helps.

Thinktank · 13th April 2005, 4:36 AM

Quote:

Originally Posted by psylink

It could be either. If your game, open up the laptop and check around the power socket that its still connected. My last presario's power socket had detatched itself from the motherboard and wouldn't allow power to work. 1x new battery, 1x new power adapter and a few bits and pieces from jaycar and i had it figured out

Hope that helps.

Awesome help, thanks, however i dont think im keen enough to open this laptop like you say , ill give it a shot and hopefully i wont make a mess out of it.

What's jaycar, sorry i'm not sure what or who they are?

and did you fix and replace the parts yourself.. Your a talented fellow.

thanks again.

nux · 13th April 2005, 9:51 AM

www.jaycar.com.au

If you leave the power supply plugged in does it get warmish? I'd say its most likely to be the laptop than the power supply.

whitey · 13th April 2005, 6:38 PM

Get someone to check the power supply for you,if it's fine then it has to be the laptop.
If the power supply is gone,it won't charge the battery or power up the lappy.

Thinktank · 13th April 2005, 7:24 PM

Quote:

Originally Posted by nuxie1

www.jaycar.com.au

If you leave the power supply plugged in does it get warmish? I'd say its most likely to be the laptop than the power supply.

I infact tryed that, but to no avail , no heat at ALL . Stone cold infact.

Thinktank · 13th April 2005, 7:26 PM

Quote:

Originally Posted by whitey

Get someone to check the power supply for you,if it's fine then it has to be the laptop.
If the power supply is gone,it won't charge the battery or power up the lappy.

When you say " Get someone to check the power supply " you mean take it to a laptop repair shop, and do they have methods to check if the power supply is faulty.

You both said if its not the power supply its the laptop ?? What part of the laptop if its not the power supply?

Sorry for being noob, Thanks in advance.

Thinktank · 13th April 2005, 7:28 PM

Ok , When i say POWER SUPPLY i dont mean the power charger , i mean the power suply IN the laptop. The part that regulates the power to the other parts of the computer.

Anyone else help?

I just want to know if a motherboard is capable of not allowing any power to run thro the computer , is this possible?

whitey · 13th April 2005, 7:40 PM

Quote:

Originally Posted by Thinktank

Ok , When i say POWER SUPPLY i dont mean the power charger , i mean the power suply IN the laptop. The part that regulates the power to the other parts of the computer.

So you mean the BATTERY,if your power supply isn't working it will neither charge the battery nor power up the lappy,i'm pretty sure(but not positive)that if the battery is dead,the lappy should still power up with the AC adapter.Most laptops run with no battery fitted.
If the power supply is OK,sounds like psylink is right on the money.
Not sure what sort of fuses or overload protection these things run,could be that too.

-=Alfonzo=- · 13th April 2005, 8:06 PM

I'd be checking out that adapter. If it's staying stone cold then it's not doing anything, which means your mainboard isn't getting any power, let alone charging your battery. Even if the battery is dead/not present, your laptop should still turn on with just adapter power. Considering it's the thing that regulates fluctuating 240V to DC voltage down around 18 - 20V (most of the time), it could've taken a bit of a hit and died.

I'm forever replacing them at work, they have a tendancy to pack it in relatively frequently with daily use. I'd be looking at that.

nux · 13th April 2005, 8:27 PM

If you, or someone you know has a multimeter (that is rated for the output power on the power supply) then check its supplying voltage.

whitey · 13th April 2005, 8:35 PM

Quote:

Originally Posted by nuxie1

If you, or someone you know has a multimeter (that is rated for the output power on the power supply) then check its supplying voltage.

If you don't have a multimeter,just place the connectors on your tongue

.

(This is a joke,don't really do it)

Thinktank · 14th April 2005, 2:29 AM

OM MY GOODNESS PEOPLE.. no nono nono

listen,

Battery is a battery , clip that goes into the laptop so it can be portable
AC adapter, used to charge battery and also to connect power from a wall socket.
POWER SUPPLY The unit inside the laptop that the AC adaptor connects to which gives the laptop POWER.

Like for your home desktops, you can buy a 500 wat power supply.

Get me now?

Thinktank · 14th April 2005, 2:32 AM

Just for the record , my battery and AC work fine..

Im trying to figure out if its the power supply or the motherboard.

MoMaN69 · 14th April 2005, 2:36 AM

give it a bath that sometimes helps

12th April 2005, 3:59 PM	#1
Thinktank Member Join Date: Mar 2005 Location: Brighton le sands Posts: 250	Laptop / Power or motherboard ? Heres the story. I Own a compaq presario 700, Problem : i have NO power at all running through the laptop , with or without a battery , with or without the AC adapter , when i press the power button , NOTHING happens. no lights , no other indication, just plain old dead. Is it the power supply , or could it be the motherboard? EDIT : If this post is in the wrong section please move MODS. __________________ It's set up like a deck of cards, They're sending us to early graves, For all the diamonds, They'll use a pair of clubs to beat the spades, RATM Last edited by Thinktank; 12th April 2005 at 4:00 PM.

13th April 2005, 2:09 AM	#2
psylink Member Join Date: Oct 2002 Location: Brisbane Posts: 178	It could be either. If your game, open up the laptop and check around the power socket that its still connected. My last presario's power socket had detatched itself from the motherboard and wouldn't allow power to work. 1x new battery, 1x new power adapter and a few bits and pieces from jaycar and i had it figured out Hope that helps. __________________ Successful Trades : seven7, Encore, KRAGGAH, leathal_leigh, Michegianni, Volumex, Nightwatchman, gjbrook, Skinz, Some Other Guy, Megsy, daffy, melbourne-ocoa, dewy, guyv3r, syxx, 1shot1kill, blackbart53, nEoKnIgHt, Danno, Andypoo, Sarkazein, chiku, StOo_Burger + many many more. Outstanding Traders : gjbrook Last edited by psylink; 31st May 2005 at 11:36 PM.

13th April 2005, 7:28 PM	#8
Thinktank Member Join Date: Mar 2005 Location: Brighton le sands Posts: 250	Ok , When i say POWER SUPPLY i dont mean the power charger , i mean the power suply IN the laptop. The part that regulates the power to the other parts of the computer. Anyone else help? I just want to know if a motherboard is capable of not allowing any power to run thro the computer , is this possible? __________________ It's set up like a deck of cards, They're sending us to early graves, For all the diamonds, They'll use a pair of clubs to beat the spades, RATM Last edited by Thinktank; 13th April 2005 at 7:30 PM.

13th April 2005, 8:06 PM	#10
-=Alfonzo=- Member Join Date: Apr 2003 Location: Redland Bay, BrisVegas Posts: 7,191	I'd be checking out that adapter. If it's staying stone cold then it's not doing anything, which means your mainboard isn't getting any power, let alone charging your battery. Even if the battery is dead/not present, your laptop should still turn on with just adapter power. Considering it's the thing that regulates fluctuating 240V to DC voltage down around 18 - 20V (most of the time), it could've taken a bit of a hit and died. I'm forever replacing them at work, they have a tendancy to pack it in relatively frequently with daily use. I'd be looking at that. __________________ successful trades \| car

14th April 2005, 2:29 AM	#13
Thinktank Member Join Date: Mar 2005 Location: Brighton le sands Posts: 250	OM MY GOODNESS PEOPLE.. no nono nono listen, Battery is a battery , clip that goes into the laptop so it can be portable AC adapter, used to charge battery and also to connect power from a wall socket. POWER SUPPLY The unit inside the laptop that the AC adaptor connects to which gives the laptop POWER. Like for your home desktops, you can buy a 500 wat power supply. Get me now? __________________ It's set up like a deck of cards, They're sending us to early graves, For all the diamonds, They'll use a pair of clubs to beat the spades, RATM Last edited by Thinktank; 14th April 2005 at 2:31 AM.

13th April 2005, 9:51 AM	#4
nux Member Join Date: Jan 2002 Location: Melbourne Posts: 16,801	www.jaycar.com.au If you leave the power supply plugged in does it get warmish? I'd say its most likely to be the laptop than the power supply.

13th April 2005, 6:38 PM	#5
whitey Member Join Date: Aug 2001 Posts: 1,612	Get someone to check the power supply for you,if it's fine then it has to be the laptop. If the power supply is gone,it won't charge the battery or power up the lappy.

13th April 2005, 8:27 PM	#11
nux Member Join Date: Jan 2002 Location: Melbourne Posts: 16,801	If you, or someone you know has a multimeter (that is rated for the output power on the power supply) then check its supplying voltage.

14th April 2005, 2:32 AM	#14
Thinktank Member Join Date: Mar 2005 Location: Brighton le sands Posts: 250	Just for the record , my battery and AC work fine.. Im trying to figure out if its the power supply or the motherboard. __________________ It's set up like a deck of cards, They're sending us to early graves, For all the diamonds, They'll use a pair of clubs to beat the spades, RATM

14th April 2005, 2:36 AM	#15
MoMaN69 Member Join Date: Mar 2004 Location: Asylum Posts: 864	give it a bath that sometimes helps __________________ \|PC = HTPC + 32" LCD\| \|console: Xbox 360 (gamertag = markmomanm ) \| \|Over 1000+ trades \| Last edited by MoMaN69; 14th April 2005 at 2:36 AM.