Question about Dell Latitude D600 Notebook

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The laptop was given to me by a friend. the screen was cracked and the ac adapter had wires ripped from the converter. i have replaced the screen and got a used power cord and it comes on to a bios admin password needed. since i cant get passed the bios it wont let me use f12 to change the boot order either. sadly my friend has since had a stroke that among other things has affected his memory. dell support is no help because i have no proof of ownership. its a dell c600. i've done some web searches on the issue and mostly find that it must be taken apart and some sort of jumper used or something. this i would not attempt. is there any other way to reset the bios admin password or am i the proud owner of a very expensive paper weight?

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You could try some of the developers backdoor passwords.
Depending on the make of bios, you may have some luck.
Here is the link to the info
http://www.uktsupport.co.uk/reference/biosp.htm

Posted on Aug 20, 2010

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My computer toshiba is not turning on


6 - SUGGESTED SOLUTIONS

I would like you to read that part. Means somewhere, someone, (Staff?), has taken it upon themselves to attach previous solutions, to your posted problem.
(They do it with my previous solutions given, also)

I have seen, "Gary Oldman plays the Bagpipes for You", and, "20 Ways to Knit a Cardigan Sweater"; given as solutions in the computer category. Guess you should feel special, that the suggested solutions even come close.......lol!

A) Nope. It is NOT an obvious 'board issue'. (Reference is to the motherboard)

B) Screen turns Black means a problem with the screen.

Really? (You're going to post that on a the world's largest product support website, and with REAL technical experts in this field looking on? Yeah,...Right!)
(....after all these were done, you must definitely get ride to this mura.......!O_O! What does THAT mean????????????)

Moving on.............

DIAGNOSE

Leave the guessing to those who like to play games.

("I bet aliens in the middle of the night, came down and put a virus in your laptop. If just the LED light on the 'charger' lights up, you know you've been had! Put a tinfoil hat on to protect yourself!")

1) The 'charger' in reference is an AC adapter. It converts the AC electricity from your home, or business; into a low DC Voltage.
(Can also be said as low DC electricity)

The LED light on the AC adapter, is an indication the AC adapter IS receiving power.
NOT an indication the AC adapter is working.

AC adapter is tested with a multimeter. See if it is putting out the correct voltage.
On the AC adapter in a label, is the Input voltage, and the Output voltage.
Example: Input: 100 ~ 240VAC @ 50 ~60Hz
Output: 19VDC @ 4.34A

Means the AC adapter can use AC electricity, that is from 100 to 240 Volts, and either 50 Cycles per Second, or 60 Cycles per Second.
Hz = Hertz. Hertz stands for Cycles per Second

Output is 19 Volts DC, and at 4.34 Amperes
The number to be concerned with here is the 19 Volts (DC)
19 Volts (DC), or VERY close; is what should come out of the cable, that plugs into the laptop.

Also suggest have an assistant gently wiggle the cable, that goes from the AC adapter TO the laptop.
If there is an intermittent reading on the multimeter, this suggests there is a broken wire in that cable.
Same procedure for the power cable TO AC adapter.

Not feasible for you, then take to nearest small computer shop, and have the resident tech check it out. Should only be a couple of bucks.

Tech indicates it's bad, has a new one, or universal one they will sell you? I think I would take my old AC adapter, and leave. May be on the up and up, may not.
If it is said that the AC adapter is bad, and you can buy a universal one almost anywhere; THEN I would tend to believe the person.

AC adapter needs to be working, and correctly. (Proper output voltage)
Charges the Battery, and also can power the laptop by itself.

2) DC Power Jack:
The DC Power Jack is the jack on the laptop (DC_IN), that the AC adapter plugs into.
If there is a problem with this jack, the laptop will not receive power.

There are various styles of DC Power Jacks.
Most common is the style, that has a large Center Pin in the middle.
AC adapter removed, Battery removed; a small object is used to GENTLY see, if the Center Pin can be moved.
ANY perceptible movement of the Center Pin, indicates replace DC Power Jack.

With the older style of laptops, the DC Power Jack is soldered directly to the motherboard.
With the newer style it is not.
The DC Power Jack has wires coming from it, (Cable), and they end in a male plug connector.
It is now referenced as a DC Power Harness.
Much easier to replace, than the old soldered on version.

3) Bad Power On switch.
It's a small carbon button switch, and they do go bad.

4) All of the above checks out, then the problem is the 'board'.
Motherboard.

More specifically small electronic parts on the motherboard, have gone to the 'Great Electronic Parts store in the sky'.
(How's that for technical? lol!)

Usually Power MOSFET's on the motherboard.
Many people then replace the motherboard. Some of us do not.

Using the HP Pavilion dv6000 series, and Pavilion dv9000 series; of Notebook PC's for an example,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

Here we see the Fairchild Semiconductor Industries - FDS6679 - Power MOSFET, and Alpha & Omega Semiconductor LTD - AO4407 - Power MOSFET; is being used.

Both are Obsolete now, but there are cross-reference examples given. FDS6679 cross-reference example,

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/FDS6679AZ/?qs=sGAEpiMZZMshyDBzk1%2fWi1qxDdW%2fXBi2qgMuZEfLVO4%3d

One dollar and one penny - USD

http://www.youtube.com/watch?v=3NN7UGWYmBY

Price of replacement motherboard? Averages from $50 to $250
Also add labor cost.

HOWEVER, there is more information that I need from you;

1) You indicate, "The screen does not turn on at all. It has no light but the charger light is the only light that turns on."

Meaning ONLY the AC adapter's Power On LED lights up?
No Battery LED light on the laptop?
The small fan is not running?

Makes a BIG difference if the fan is running.

Also post the laptop manufacturer, and model number.
The model number is on the Bottom of the laptop.

Using Compaq and HP laptops as an example, post the Product Number.
This is P/N in the white Service Tag, on the bottom of the laptop.

Post back in a Comment.
Regards,
joecoolvette

May 05, 2013 | Toshiba Computers & Internet

1 Answer

HP screen goes black 5 seconds after ac adapter is plugged in or out


This may not be the ac adapter itself. the metal prongs on the side of your HP Laptop to connect to the wire of your ac adapter may be bent or shortciruited. try to get a replacement which may be hard depending on what type of HP Laptop you own. or you may just have to send it back if you dont know how, in order to avoid breaking the warranty policy by mistakenly damaging it.

Apr 18, 2013 | Computers & Internet

1 Answer

Plugged in and not charging


1) Use a multimeter, check the AC adapter (Charger) for power.
Make sure it is putting out the required voltage.

Have an assistant gently wiggle the cable FROM AC adapter TO laptop. See if there is an intermittent reading on the multimeter.

Have an assistant gently wiggle the power cord.

An intermittent reading on the multimeter indicates a broken wire.
Power cord is bad? Replace cord.
Cable from AC adapter to laptop is bad? Replace AC adapter.

If you have posted the laptop manufacturer NAME and MODEL NUMBER, I could have given you more than generic information.

Model Number is in the Bottom of the laptop. Post back in a Comment.

AC adapter works OK?

Check the DC Power Jack.
The DC Power Jack is the jack on the laptop, that the AC adapter plugs into.

DC Power Jack checks OK, this is your problem,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

Regards,
joecoolvette

Jan 31, 2013 | Computers & Internet

1 Answer

Compaq presario v6317 not turning on


Computer does not boot upThe problem maybe the RAM, it is faulty or just needsreseating to make proper electrical contact.
Reseat the RAM and then boot up your laptop. If it still does not boot up thenremove the RAM module/s and take them to your friendly computer repair shop andget them to test the RAM for you.

May 04, 2012 | Compaq Presario Computers & Internet

1 Answer

My latitude D530 laptop doesnt recognize the ac adapter anymore a screen tells me to reset the adapter, how do you do that. I been using this adapter and battery for awhile now it doesnt recognize it


The AC adapter has a small wire in the center of the connector to the system. This sensing wire, if bent or broken will cause the error you mention.
If it's still under warranty contact Dell Support. If not, you'd better buy one replacement.
Try this link: http://www.chargerbuy.com/replacement-dell-latitude-d530-ac-adapter-65watt-19-5v-3-34a.html

Mar 09, 2011 | Dell Latitude D530 Laptop AC Power Adapter...

3 Answers

Advent N270 netbook will not charge. Orange light comes on initially then goes off. Also when I wiggle the plug into the laptop the light flashes on and intermittently.


It sounds like either a bad connection on the motherboard or a broken wire in the adapter making intermittent connection.

1. With the power adapter disconnected, do you have a power light? This would indicate the adapter is good and the plug is questionable.

2. Check your power adapter output with a multi-meter.(be sure to wiggle the wires around) If the power fluctuates, replace the plug.

3. If the power is solid, replace the motherboard connector.

Nov 22, 2010 | Intel Computers & Internet

1 Answer

Laptop won't power on with ac adapter or battery


Could be a combination of things.

1) Battery is low. Not enough power to turn the laptop on.
Caused by;

2) AC adapter has a plug on the end of the cable. The plug plugs into a DC Power Jack on the laptop.

The DC Power Jack is bad.

2a) The DC Power Jack has a bad connection to the motherboard, (Cracked solder joints), and/or the jack itself is bad.

2b) Center Pin is loose in the jack's mount.
The back of the Center Pin where it mounts has become loose.

2c) The plastic body of the jack, which composes the jack's case, is cracked. This allows movement of the Center Pin.

2b, and 2c cause a bad connection with the AC adapter plug.

No charge to the Battery, no power to the laptop.

http://www.laptopjacks.com/view_part/For-Gateway-MX6920-DC-Power-Jack-GW51425.html

[ If this is the case the DC Power Jack needs to be resoldered to the motherboard. The cracked solder joints need to be re-melted, (Reflowed)
Entire laptop needs to be disassembled down to the bare motherboard in your hand.
(No Processor, Ram Memory, or any adapter cards mounted to the motherboard. Nada)

OR,
The DC Power jack needs to be replaced.
This entails disassembling the entire laptop, down to just the motherboard in your hand. (Same as above)

The old DC Power Jack is de-soldered, and a new one soldered in place.

Very FEW computer repair shops have the necessary skill level.
They just want to replace the entire motherboard.
IF one is available.
More Ka-Ching for them also. ]

3) The AC adapter is bad.
Not providing power to the laptop, to charge the Battery, nor give power to the laptop without the Battery.

AC adapter cord from adapter to plug, which plugs into the laptop, (DC Power Jack), may have a break in it.

May be an intermittent contact provided by wiggling the cord.
If this is the case the wires have stretched, and broken.
Wiggling causes the wires to briefly touch, and make contact.

Where this cord meets the plug itself. A lot of times there is a break in the wires in this area.

Solution is to replace the AC adapter. There are universal AC adapters you can buy, or perhaps Gateway still has some for sale.
(Ka-Ching)

Oct 21, 2010 | Gateway MX6920 Notebook

2 Answers

Green light on ac charger goes out when i plug it in to lap top


This indicates a short in the computer or power supply. The power supply senses the problem and shuts itself off. Does the laptop run at all? More info. is needed to correctly solve your problem. Send me a message and I will help you out. Phil

Dec 09, 2009 | Dell Inspiron 1501 Notebook

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