What hardware components would cause a computer to not turn on?

Ok, how have you done all the things (cmos etc) and now you are asking us how to pull it apart?

Remove the battery and power cable and hold down the power button for 30 seconds.

Replace battery and power cable. Turn on.
 
This sounds very much like a failing power supply ...get a different power supply to use even to eliminate if it isnt the power supply itself....i have had a similar issue in the past before
 
This sounds very much like a failing power supply ...get a different power supply to use even to eliminate if it isnt the power supply itself....i have had a similar issue in the past before

nice tautology.

I think he replaced the power supply unit. Its hard to follow ill grant you.

Captain Kirk, list without description, what you have replaced.
 
Spirit,
Thanx a lot buddy for that diagnostic list of yours -- that really helps.
And I appreciate the clarification about the Laptop/Desktop mobo light issue -- that's one more thing out of the way.
I guess you seem to like Desktops better than Laptops like me!
I am not fond of laptops myself -- Desktops are so much easier to fix in so many ways, and for so many different problems!!
It's nice that you told me everything that you know.
I'll take your advice and reread the manual much closer this time: maybe there's something in there that I missed.
There's are several computer manuals: The User's Manual, the Technical Manual, and possibly another one if they have it.
Guess I'll read through all of them. I don't know which one it'd be in.

Dear Okedokey,
When I said, "open the computer up", what I meant was where you take out 4+ screws out of each corner of the computer, and lift up the keyboard/monitor, separating the computer from its other 'half' where the mobo is located. It is here that you can (probably) see the IDE cords and the CPU microchip processor. I am not talking about the small box that opens the CMOS chamber.

However, in a sense, you are right, now that think about it, because there is a plug attached to the Modem Card, so therefore, you can conclude that most likely ALL plugs are the same, or, at the very least, that there may be other plugs like them on the laptop. That is a good idea Okedokey. So then, the question is:
1. "Are all plugs in laptops the same"?
2. "What are the different methods/techniques that you use to unplug them"?


Another main issue here is this:
When you pull the two "halves" of the laptop apart, there is not much room to manuever (because of the cord that you don't want to break) your hands or even to be able to get a good grip on the plug, AND the plug is so dang small that its hard to get a grip on the thing -- in addition to it being VERY delicate.

But anyways, you may not have realized it, but you gave me some potentially really good advice -- or at least something that could be very importaint!
Take out the rechargeable battery before opening up the computer. Did you 'also' mean the CMOS battery?
But I have seen people open up and fix there compters while they are still on/plugged in. Where there was no face plate on the computer and you could see the raw mobo.

Dear Whizzy,:o

Please read the previous post on this same thread.
You have any ideas why this happening?
1. (The rechargeable internal laptop battery is charging just fine and is at max power)
2. (A light goes on on the power cord)
3. (I got a brand new power cord)
4. (The computer has started before)
* (There is a brand new CMOS battery)
(


Okedokey,
Thanx for the reply!

list without description, what you have replaced.

1. CMOS Battery
2. DVD drive
3. Power Supply
4. 1 RAM Card
5. 1 RAM Card
6. Hard Drive

Captain Kirk
USS Enterprise
 
How old is this laptop? I'm still going to suggest that the board may be dead, preventing it from starting. Not really a lot you can do if that is the case unless you are prepared to try and install a new board.

Seems like you've done most of the things I would suggest without any luck.
 
Also confirm that you have done the: remove battery, remove power cable, computer off. Hold down ON button continuously for a minute. Replace battery, replace cable and power. Turn computer ON.
 
Okedokey,
Hello there.

Thanks for the advice.
Okay, I just tried what you said:
I confirmed that this process does not work, or get ANY response.
Well, it 'was' worth a try.

Spirit,
Hey Bro!!

Well, it sure seems that "luck" is definitely not with this laptop.
However, there is one more thing that I can do on that list of yours, but this requires "opening up" the laptop.

Everybody,
I have NEVER opened up a laptop case before. I have opened desktops, though, so I know how its done.

Internal cables:

1. "Are all cable plugs in laptops the same"?
2. "What are the different methods/techniques that you use to unplug them"?
[Is there a button or latch that you have to press or pull, or do you need a tool. The plugs are very small and delicate, and can be broken easily!]


Captain Kirk
USS Enterprise
 
Spirit,
Hey Bro!!

Well, it sure seems that "luck" is definitely not with this laptop.
However, there is one more thing that I can do on that list of yours, but this requires "opening up" the laptop.
What are you trying to do which requires opening up the laptop?
 
What are you trying to do which requires opening up the laptop?
Agreed. Don't start going inside until you know what you are looking to fix is inside.

Internal cables:

1. "Are all cable plugs in laptops the same"?
2. "What are the different methods/techniques that you use to unplug them"?
[Is there a button or latch that you have to press or pull, or do you need a tool. The plugs are very small and delicate, and can be broken easily!]


Captain Kirk
USS Enterprise
1. No. Each one is separate and will not plug into the wrong socket.

2. Either strait pull, or lift the door and pull. Sometimes a fine tipped screwdriver can help dislodge them, but it is rarely needed.
 
Open Sesame

Spirit,
Hello There!:)

The possible USB shorting issue.

WolfKing,
What's up bro!:D
Glad you made it.

1. What I meant was, do you use the "same" method to unplug ALL laptop cable plugs?
2. So by "door", you are talking about the prong edge of the plug?
[The cable plugs that I'm talking about are about 1/4" big, and connect one cable wire to another, and don't go into the board itself]

Well, according to Spirit's Dianostic List, there is one thing that is of interest.
Specifically the part about how, and I quote, from Spirit's Dianostic List:

"You might also want to check your USB ports. What can happen sometimes with broken USB ports is that two or more of the pins inside the port itself can be touching each other and that can prevent the board from POSTing at all. Check to make sure none of the pins are touching each other and if they are, straightening them out will solve the issue."

Therefore, I need to check the port and possible remove it.

Captain Kirk
USS Enterprise
 
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Yeah you need to look at the USB port itself and see if anything inside it is touching. You don't need to open up your laptop to see.

There's no way to really remove USB ports. They're soldered onto the motherboard I believe.
 
Thanx for the reply,

Previously, when the computer was running, 1 of the USB ports didn't work, that is why is suspect this of being the problem.
Okay, so I looked at the USB port.
1 of the ports appears strong and in good shape.
The second port, however, appears to be slightly wobbly, and has a 1 mm gap in the outside metal shell.

As far as the

see if anything inside it is touching,

you are talking about the "tongue" inside of the port?
The black plastic shelf inside the port is not broken or dangling, and inside (with a flashlight, laptop not opened), everything appears normal.
The only difference is that it is a bit "loose".

Does the tongue have to be broken to constitute a shorting situation?

That was the next question that I was going to ask you --
Can the USB ports be removed or are they weilded in.
Dang -- I thought that was a possibility: so no USB ports can be replaced on any laptop huh?

Captain Kirk
USS Enterprise
 
There's no way to really remove USB ports. They're soldered onto the motherboard I believe.
This depends on the laptop design. Some are on riser boards (M6300/M90 for example), and some use connector cables (most newer laptops) for the USBs on one side of the unit. Then you have 1-3 of them directly on the motherboard.

A shorting on the riser, or cable driven ones can be solved by unplugging them. If it is a board mounted one, then you're pretty much SOL as far as fixing it.
 
WolfeKing,

I take it the laptop that I have is a "riser" board, meaning that the USB port can't be removed?:eek:

I attempted to take the laptop apart. It seems that not all of it can come apart, though a part of it appears at the "seam" to open further, but I did not force it, otherwise I know that it would have broke. I wasn't able to get to the USB port, but a "seam" indicated that it was possible. All the screws were out of the computer except for one backwards screw nut. I gave up at this point and put it back together.

By the way, taking the plugs apart were easier than I thought -- the main part was that they were hard to grip and there wasn't much room to manuever!

Is there any way to test the processor or mobo, as this is what I have narrowed it down to?

Okedokey,

At this point, I don't think even taking to the shop will do anything!!:good:

Captain Kirk
USS Enterprise
 
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