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How to test HP pavilion DV8-1093ca AC adapter?

I verified that plug of this ac adapter have 3 contacts. Outside Cylindrical, Inside cylindrical and center pin (needle type).

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You need a multimeter to test the current exactly. It is important to check it exactly as this is most important for the safety of your motherboard. Hope this helps

Posted on Apr 26, 2013

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Posted on Jan 02, 2017

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SOURCE: AC adapter not recognized

If you don't get any errors when you startup on battery then all you have to do is call Dell. Get work order number and send them the laptop and adapter. They are very fast. I sent a laptop to them last month and I had it back in 3 days! I was surprised.

Posted on Dec 04, 2008

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Dragonhawk tattoo gun


Not really my area of expertise.

But I bet I'm more qualified than most people.
(Mechanic, machinist, fabricator, welder, computer geek, etc)

Looking at the Dragonhawk Tattoo Gun shown in this example,

http://www.amazon.com/DragonHawk-Tattoo-Color-Deluxe-Case/dp/B0055EIFC6

,I see the gun works with Solenoids.
The coil is energized with electricity, and pulls the iron cylinder core back, and forth.
This cylinder then hits a flat metal bar, and the bar is connected to the tattoo needle. (Through the various mechanism)

A) Your power adapter is an AC adapter. It converts the AC voltages from your home, or business, into low DC Voltage.

First thing to check is that it IS delivering power.
LED light lit up on the AC adapter means it is GETTING power, but we do not know if it is delivering power to the gun.

A multimeter is used to check.
Now wait a minute...............
An inexpensive multimeter can be purchased for as little as $5 to $12, if you do not have access to one.
Available in a multitude of stores.

An auto parts store is but one example.
I have seen them on checkout aisle racks, at major discount stores.

Looking at the AC adapter, what style of plug does it have, for connecting to the gun?
I need to find out what the Positive connection is, and the Negative connection.

The multimeter Function Knob is set to DC Voltage.
If just a symbol, the symbol is a dotted line over a solid line.

[IF there is more than one DC Voltage scale, set it to the 0 - 50 Volts scale.
0 to 50 Volts DC ]

The Positive (Red) probe lead of the multimeter, touches the Positive connection, of the plug that connects into the gun.
The Negative (Black) probe lead touches the Negative connection, of the plug that plugs into the gun.

Voltage is read. Don't know what the voltage is, but YOU will.
Look at the AC adapter's label.
Input: 100 ~ 240 Volts / AC 50 ~ 60Hz

We need -> Output: xxVDC @ xxA

(xxVDC is how many DC Volts.
Let's use 12 as an example.
12VDC

xxA is how much Amperage.
Let's use 3.67A as an example
3.67Amp's, or 3.67 Amperes. Same/same)

AC adapter is putting out the required voltage?
Then the switch is checked next.

Check switch for continuity.

[ Check with multimeter set to OHM's. 1K.
NO AC adapter connected to gun.

Positive ( Red) probe lead to one side of switch.
Negative (Black) probe lead to the other side of the switch.
Turn the switch to on.

If the switch is good you will get a reading on the multimeter.
DOES NOT matter at this point what the reading is.
Just matters that you DO get a reading ]

Switch is good?
Then there is a problem with one of those coils, going around the cylindrical metal bar. Perhaps a wire going to them is broken off.
Or wires in the coil have burnt.

There is a set screw for adjusting how far the vibrating metal bar, is away from the cylindrical metal bar.
Determines the distance of the flat vibrating metal bar, to the cylindrical metal core in the coil.

If this has been adjusted too tight, the flat metal bar won't vibrate.
Doubt this is the problem, or you would have stated the gun 'Hums', but won't vibrate.

[The black cylindrical things are coils. The shiny cylindrical metal objects inside them are the vibrating cores ]

I suspect the AC adapter isn't putting out any power, or the switch on the gun is bad.

Post back in a Comment, about the design of the plug from AC adapter, that plugs into the gun.

Regards,
joecoolvette

Jan 21, 2013 | Computers & Internet

1 Answer

Problem with HP 8510q laptop charging. Charging not working. Laptop working only that time when i have power in battery. Charging light not show. I try other charger but same problem. Is it inside some...


Inside? Yes. (If 'charger' is good)
Fuse?
No

Diagnostic flowchart:

A) AC adapter (Charger), has to be KNOWN to be good, before going on.
Used on a working laptop to see, or multimeter is used to check Voltage (DC)

The plug end that goes to the laptop, from the AC adapter, has a Center Hole, and a cylindrical outside metal shell.

The Function knob is set to DC Voltage. If just a symbol, the symbol is a dotted line over a solid line.
If more than one DC Voltage scale, the Function knob is set to the 0-50 Volt DC scale.

The Positive (Red) probe lead of the multimeter goes to the Center Hole, and the Negative (Black) probe lead of the multimeter, goes to the cylindrical outside metal shell.

You should be reading 19 Volts DC.

Also have an assistant gently wiggle the cable FROM AC adapter TO laptop, and the power cable TO AC adapter.
If there is a fluctuation on the reading, there is a broken wire, or wires, in one of those cables.

B) Check the DC Power Jack.
This is the jack on the laptop (DC_IN) that the AC adapter plugs into.

Has a Center Pin, and an inner cylindrical metal shell.
Battery removed, use an eraser on the end of a No.2 pencil, and see if you can GENTLY wiggle the Center Pin around.

ANY perceptible movement of the CENTER PIN, means replacing the DC Power Jack,
(By the way, is it an 8510p, or 8510w?)

http://www.alldcjacks.com/en/ppj052-laptop-dc-power-jack.html

Any movement of the rest of the DC Power Jack (Body), means replacing it; or may just mean the solder joints are cracked, and can be re-soldered.

C) AC adapter and DC Power Jack checks out?
Problem may be with Power MOSFET's on the motherboard, and associated MLCC's.

(Multi-Layer Ceramic Capacitor, and they are SMD/SMT just like the Power MOSFET's.
Surface Mount Device/ Surface Mount Technology)

Using HP pavilion dv6000 series, and Pavilion dv9000 series Notebook PC's, for an example,

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

Or, it could be worse,

http://koti.kapsi.fi/jpa/stuff/pix/travelmate_6292/

Regards,
joecoolvette

Dec 23, 2012 | HP Compaq 8510p Notebook

1 Answer

Can i use any charger on s505


The Toshiba Satellite 5205 series of Notebook PC, and the S505 series model; uses an AC adapter (Charger) that produces 15 Volts DC.

http://www.sparepartswarehouse.com/Toshiba,Satellite,5205,PS520U-31P1RV,Laptop,AC-Adapters.aspx

You will see AC adapters sold that show 15 to 24 Volts. (DC)

http://www.duracelldirect.com/toshiba_satellite-5205-s505_ac-adapters_laptop_ac-b20h.aspx

This is because the AC adapter (Charger) has PFC.
Power Factor Correction,

http://www.hardwaresecrets.com/article/Everything-You-Need-to-Know-About-Power-Supplies/181/2

Also I see it is just a two pin AC adapter plug, to laptop.
Center hole is Positive, outer metal cylindrical metal shell is Negative.

Go for 75 Watts or higher though, and not a 65 Watt model.

[ On the case of the AC adapter;
Input: 100 ~ 240 VAC 50-60Hz

Means it can use from 100 to 240 Volts AC, and either 50 or 60 Hertz.

Output: 15VDC 6A

Means 15 Volts DC at 6 Amp's. (Amperes)

Watch the outside dimension of the cylindrical part, and the center hole dimension. Outside cylinder may be correct, but center hole may be too small. Or vice-versa.

Regards,
joecoolvette

Dec 17, 2012 | Toshiba Satelite 5205-S505 Notebook

1 Answer

HP Pavilion dv8 not starting up


Ya know........Pavilion dv8 is a Series of Notebook PC's.

Encompasses a LOT of models in the series.

Have no idea of which LED in front you are referring to.

Do know;

1) Test the AC adapter (Charger) with an economical multimeter.
Average cost is $5 to $12.
Set to DC Voltage, and check the output voltage of the AC adapter.

As far as I can tell the DV8 series uses 18.5 to 19 Volts. (DC)
Use an AC adapter that is rated at 90 Watts, NOT 65 Watts; if using a replacement AC adapter.

The port on the laptop that the AC adapter plugs into is a DC Power Jack. (DC_IN)
The plug end on the power cable from the AC adapter, and plugs into the DC Power Jack, has a Center Hole, and an outside cylindrical metal shell.

The Center Hole is the Positive connection. This is where the Positive (Red) probe lead of the multimeter goes.
The outside cylindrical metal shell is the Negative connection. This is where the Negative (Black) probe lead of the multimeter touches.

Also have an assistant gently wiggle the power cord TO AC adapter; and power cable FROM AC adapter to laptop.
Intermittent reading indicates a broken wire, or wires.

DC Power Jack LED lights up? Means nothing to me. I want to know the FULL DC Voltage is getting TO the laptop, and there are no breaks in the wires of the power cable, or power cord of AC adapter.

THEN AC adapter checks out.

2) AC adapter checks out?
What condition is the DC Power Jack in?
Battery removed, use the eraser end of a No.2 pencil, and GENTLY see if you can wiggle the Center Pin around.

ANY perceptible movement of the Center Pin, means replacement of the DC Power Jack.
Fortunately for this series the DC Power Jack is connected to a cable with wires, and they end in a plug connector. Which plugs into the motherboard.
It is now a DC Power Harness.

HP calls it a Power Connector Cable.

http://www.amazon.com/PAVILION-Series-DC-IN-POWER-HARNESS/dp/B005WMWMMU

3) Next in line are the Power MOSFET's, in the power circuit section, on the motherboard.

!O_O!

MOSFET;

http://en.wikipedia.org/wiki/MOSFET

Power MOSFET;

http://en.wikipedia.org/wiki/Power_MOSFET

Should be on the motherboard, near where the Power Connector Cable plugs in.
Rectangular shaped with 8 'legs'. ('Legs' are J-Leads)

Believe one or more to be the problem.
Typed the rest above because it is a power flowchart, and when diagnosing always go through the steps.
Would s-uck to replace a motherboard, when the problem was an AC adapter, it's power cord, or the DC Power Harness.

This is more on the subject, by using the HP pavilion dv6000 series, and Pavilion dv9000 series of Notebook PC's; as examples,

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

Further this is to show the availability of the Fairchild Semiconductor - FDS6679 - Power MOSFET, and Alpha & Omega Semiconductor - AO4407 - Power MOSFET,

http://www.mouser.com/Search/Refine.aspx?Keyword=FDS6679

Scroll down.

http://www.mouser.com/Search/Refine.aspx?Keyword=AO4407

AO4407 has been phased out. Let's look at one of the cross-reference examples given,

http://www.mouser.com/ProductDetail/Diodes-Inc/DMP3020LSS-13/?qs=%2fha2pyFadujguNNSgppBRqXbOxXLwzGsZm9SWxz1EqWpzoSJOpHpWA%3d%3d

That is correct. $1.01 USD for a FDS6679, and 78 cents for a substitute AO4407.

http://www.youtube.com/watch?v=5uiroWBkdFY

http://www.youtube.com/watch?v=RjpNbuOrOuw

Also check the MLCC's (They are also SMD. Surface Mount Device)
Multi-Layer Ceramic Capacitor

Here are examples. Not correct values, Capacitance, (MicroFarad's), and Voltage,

http://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT/_/N-b2cj?P=1z0wrjcZ1z0x565

Scroll down.

These will be close to the Power MOSFET's.
See if any are burned, or blistered.

HP Support > Pavilion dv8-1100 using for an example > Manuals download page,

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&dlc=en&lang=en&lc=en&product=4100035&

Scroll down.
HP Pavilion DV8 Entertainment PC - Maintenance and Service Guide; in blue.

This is a free Service Manual.
Remove ALL Power. Remove the AC adapter, and Battery.
USE an ESD wrist strap, and have it's alligator clip attached to a good ground source.

For additional questions please post in a Comment.

Regards,
joecoolvette



For additional questions please post in a Comment.

Regards,
joecoolvette

Dec 10, 2012 | Computers & Internet

1 Answer

Wiring diagram battery pack aspire 5580


Are you asking for the wiring diagram inside the main Battery?

If so, due to very possible injury, or death to you, there will be No solution.

Now, if you are talking about what is the polarity for the plug of the AC adapter, (Charger), that plugs into the DC Power Jack on the laptop, (DC _IN), then I'm on board.

The Center Hole in the plug end is the Positive ( + ) connection.
This is where the Positive (Red) probe lead of the multimeter goes.
The cylindrical outside metal shell is the Negative connection.
The Negative (Black) probe lead of the multimeter touches here.

Voltage is 19 Volts DC.

Wiring diagram for the inside of the AC adapter itself?
No gottom.

Regards,
joecoolvette

Oct 22, 2012 | Acer Aspire 5580 Notebook

1 Answer

Gateway id49c notebook power issues


http://support.gateway.com/s/notebook/2010/gateway/id/id49C/ID49Cnv.shtml

1) Test the AC adapter (Charger) first.

http://www.itsbattery.com/gateway-ac-adapter/Gateway-ID49C-AC-Adapter.html

Test with a multimeter.
(An economical multimeter can be purchased for as little as $5 to $12. Available in a multitude of stores. An auto parts store is but one example. Checkout aisles of major discount stores, may have them on the rack)

Function knob set to DC Voltage.
(If just a symbol the symbol is a dotted line over a solid line)
If more than one DC Voltage scale set it to the 0 - 50 Volt scale.

Positive (Red) probe lead of multimeter goes to the Center Hole, of the plug end that plugs into the laptop.
Negative (Black) probe lead touches the cylindrical metal shell, on the outside of the plug end.

You should be reading 19 Volts DC.

Also have an assistant gently wiggle the cable from AC adapter to laptop, and power cable to AC adapter (Charger)
Fluctuation in the reading means you have broken wires.

AC adapter checks out OK?

2) DC Power Jack:

The DC Power Jack is the jack on the laptop, that you plug the AC adapter (Charger) into. (DC_IN)

Battery removed, (And AC adapter, 'natch), use a No.2 pencil, and with the eraser, gently see if you can move the Center Pin around.
ANY perceptible movement means damage to the DC Power Jack, and replacement.

3) AC adapter and DC Power Jack checks out?

Problems with the Power MOSFETs used in the power section, on the motherboard, or possibly Ceramic Capacitor failure.
(Multi-Layer Ceramic Capacitor, and they are Surface Mount Devices)

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

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

Looking down at the second photo with the Alpha and Omega Semiconductor - AO4407 - Power MOSFET circled in Yellow, look at the small rectangular shaped object to it's Right. Has a wide dark band on it.

This is a Ceramic Capacitor.
There is one above it of the same size, one above that one, and one to the right of the top one.
If any one of these, or the Power MOSFETs are blistered, blackened, or bubbled, they need to be replaced.

Due to issues that could arise by replacing, and having more components be bad, or go bad; the logical choice by most tech's is to simply replace the motherboard.
(Also puts more dinero in their pockets)

[ Your user name reminds me of Hee-Haw. "If it wasn't for bad luck I wouldn't have any at all." Lol!

Hey...........it's going to get BETTER! ]

For additional questions please post in a Comment.

Regards,
joecoolvette

Oct 16, 2012 | Gateway mb.wq502.001 - Id49c Intel Laptop...

1 Answer

HP Pavilion DV2000 will not start when power button pressed


Could be a bad;
1) AC adapter (Charger),
Or
2) DC Power Jack, (Jack that the AC adapter plugs into on the laptop),
Or
3) Power On switch, (Power Button Board),
Or
4) Display Lid Switch Module,
Or
5) Power MOSFETs on the motherboard,
Or
6) Ceramic Capacitors on the motherboard.

1) AC adapter:
General example,

http://www.amazon.com/Original-HP-65W-Adapter-Pavilion/dp/B002QCUIZC/ref=sr_1_6?ie=UTF8&qid=1350152535&sr=8-6&keywords=ac+adapter+hp+dv2000

The plug end that plugs into the laptop has a Center Hole, and a cylindrical metal outside shell.
The center hole is the Positive connection.
The cylindrical metal shell on the outside is the Negative connection.

Multimeter function knob set to DC Voltage, the Positive (Red) probe lead goes to the Center Hole.
The Negative (Black) probe lead touches the cylindrical metal shell.

[An inexpensive multimeter can be purchased for as little as $5 to $12. Available in a multitude of stores. An auto parts store is but one example, or look on the checkout aisle racks of major discount stores.
If just a symbol, the symbol for DC Voltage is a dotted line over a solid line. More expensive multimeters have an auto detect feature, that sense when the multimeter is connected to AC voltage, or DC voltage )

You should read 18.5 Volts (DC)

While testing have an assistant gently wiggle the cable from AC adapter to laptop, and the power cord to the AC adapter. A fluctuation of the reading indicates there are broken wires.

AC adapter checks out OK?
Go to the DC Power Jack.

The DC Power Jack on the laptop may have DC_IN next to it.
It has a Center Pin, and surrounding metal shell.
Battery REMOVED, use a No.2 pencil, and see with the easer if you can move the center pin.

If so the jack needs to be replaced.

The DC Power Jack for this model series is attached to wires, that end in a small white plug.
The small white plug plugs into the motherboard.
Easier to replace, than models that have the DC Power jack soldered directly, to the motherboard.
It's a DC Power Harness, and HP labels it a Power Connector Cable.

HP 430462-001 for models that have a UMA motherboard.
HP 430461-001 for models using an Intel processor.

DC Power Jack checks out OK?
Power On switch.

http://www.ebay.com/itm/New-OEM-Power-Switch-Button-Board-for-HP-DV2000-DV2500-DV2700-HL50-4F615-001-/300734714047?pt=Laptop_Adapters_Chargers&hash=item46052f90bf

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?cc=us&dlc=en&lang=en&lc=en&product=1817074&

In the list click on -
HP Pavilion dv2000 Notebook PC Maintenance and Service Guide

This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on the above file name, it may take up to 30 seconds before the first page comes up.

The PDF reader page numbers, and the actual manual page numbers, do not match. When I refer to a page it is the PDF file page.
Go to Page 141 - Switch Cover
Pages 142 and 144 have more details on the Power Button Board.
(Power Button Board is HP part number 417084-001)

How to test?
Multimeter set to OHM. Straight pins (2) in the socket holes of the removed, Power Button Board's cable connector.
Positive probe lead to one pin, Negative probe lead to the other straight pin.
Press the Power On button.

ANY reading indicates a good Power On switch.
No reading of course means a bad one.
(Remember; the Power On switch is a Momentary Contact Switch.
You will just get a brief reading on the multimeter, if good)

Or you can use a small flat tip Jewelers screwdriver, and TEMPORARILY touch the two contact pins on the motherboard, where the Power Button Board's cable plugs into.

Page 179 for the Display Switch Lid Module,
(HP 417087-001)

http://www.sparepartswarehouse.com/HP,Laptop,Part,417087001.aspx

Unplugging the Display Switch Lid Module from the motherboard, and pressing the Power On button, starts the laptop, you need a new lid module.

Power Button Board, (Power On switch), and Display Switch Lid Module checks OK?

Motherboard problems.
There are Power MOSFETs on the motherboard. These are located close to where the plug of the Power Connector Cable, plugs into the motherboard. (DC Power Harness)

The Power MOSFETs control;
Whether the Battery needs a full charge, or a trickle charge.
Whether the laptop is to just run off of the AC adapter, or Battery.

Look to see if any are blackened, burned, or blistered.
Information using the HP Pavilion dv6000, and Pavilion dv9000 series of Notebook PC's,

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

Just to show the average cost of a Fairchild Semiconductor - FDS6679 - Power MOSFET,

http://www.mouser.com/Search/Refine.aspx?Keyword=FDS6679

One dollar and one penny USD.

Looking at the second photo down on the Mayohardware blog link, look at AO4407.
(Alpha and Omega Semiconductor)

Look to the right of the Yellow circled AO4407. That small rectangular shaped object, with a dark wide band on it, is a Ceramic Capacitor.
There is one above it of the same size, one above that, and one to the right of the top one.

Average cost of them is around 62 cents to 80 cents.

Average cost of a replacement motherboard is around $40 to $60 on Ebay.

That does it for me right now. Post additional questions in a Comment.

Regards,
joecoolvette

[If you had stated it seemed the laptop came on, but had a blank screen, that is a Different problem ]

Oct 13, 2012 | Compaq Pavilion ZT3280US Notebook

1 Answer

Service manual


HP AC adapter, HP part number 416421-021?

http://www.amazon.com/Compatible-HP-416421-021-Adapter-Charger/dp/B0050DN8X8

Plug going from AC adapter to DC Power Jack on laptop;

Center of the plug is the Positive ( + ) connection.
This is where the red Positive probe lead of the multimeter goes.

The outside cylindrical metal shell is the Negative ( - ) connection.
This is where the black Negative probe lead of the multimeter goes.

The Function knob should be set to DC Voltage.
(Unless you have a multimeter, that automatically detects whether it is AC, or DC voltage you are testing)

If more than one scale set it to the 0 - 50 Volt scale.
You should read VERY close to 19 Volts.

[Label on AC adapter.
Output: 19V / 4.74A

19 Volts at 4.74 Amp's. (Amperes)
Don't worry about the Amperage, just the Voltage ]

For additional questions please post in a Comment.
Regards,
joecoolvette

Jul 10, 2012 | Computers & Internet

2 Answers

The adapter light is on when first plugged in but then when I connect the adapter to my laptop the light goes off and it doesnt supply any power


I suggest check out the AC adapter first.

1) When plugged into power, and plugged into the laptop, gently wiggle the cable from the AC adapter TO laptop.

Any change?

Do the same on the power cord TO AC adapter.

NO?
Go on.

2) The port on the laptop that the plug from the AC adapter plugs into, is the DC Power Jack.
If we are discussing an Acer Aspire 5738Z Notebook PC, the DC Power Jack resembles this one, (Not installed),

http://www.batterysupport.com/acer-aspire-5738-jack-p-302046.html

(When I note the DC Power Jack, it is this link I will be referring to )

As you can see there is a Center Pin. All power removed from the laptop, use a small wooden, or plastic object, and see if this pin moves around.

ANY perceptible movement means a bad DC Power Jack.

DC Power Jack checks out it's back to the AC adapter.
Wanted to perform the easy diagnosis first.

This will require a multimeter. An economical, yet fine for this test multimeter, can be purchased for as little as $8 to $12.

Available in a multitude of stores. An auto parts store is but one example.
Analog or digital is fine.

http://www.youtube.com/watch?v=bF3OyQ3HwfU

(Analog is fine. Some of us still like 'em)

DC Voltage is what you are going to check.

Black probe lead (Negative) goes in the Common port on the multimeter. (COM)
Red probe lead (Positive) goes in the Voltage port on the multimeter. (V)

If the multimeter just has symbols around the Function Knob, set it to the dotted line over a solid line, symbol.

The plug on the end of the AC adapter, that plugs into the laptop, has a center hole, and a cylindrical metal shield surrounding it.

The Center Hole of the plug is where the red Positive lead, of the multimeter goes.

The outside cylindrical metal shell is where the black Negative lead of the multimeter goes.

Hold the AC adapter plug in one hand, and at the same time hold the red Positive multimeter probe in the center hole.

With the other hand touch the black Negative lead of the multimeter, to the cylindrical metal shield on the outside of the plug.

You should read 19 Volts (DC), or VERY close to it,

http://www.cellularfactory.com/laptop/ACER/3/305268/

I believe the AC adapter is the problem. Post back in a Comment as to your findings.

Regards,
joecoolvette

Apr 29, 2012 | Acer Aspire 5738Z-423G32Mn Notebook

1 Answer

I have a advent 7201.it will not come on on its own and it will not come on when the charger is plugged in.the green light is on on the charger but no power on the laptop.could it be the battery or th


Use a multimeter.

An economical unit can be purchased for as little as $8 to $12.
Available in a multitude of stores. An auto parts store is but one example.
Analog or digital is fine.

The Red probe lead is the Positive lead. Plug it into the hole with the red circle, on the multimeter.

The Black probe lead is the Negative lead. Plug it into the hole circled with a black ring., on the multimeter.

The center knob is the Function knob.
Set it to DC Voltage.
If just a symbol is shown, set it to the dotted line over a solid line symbol.

If there is more than one DC Voltage scale, set it to the 0 - 50 Volt scale.

The plug of the AC adapter (Charger) that plugs into the laptop, has a center hole, and an outside cylindrical metal shell.

The center hole is Positive.
The outer cylindrical metal shell is Negative.

Positive probe lead to the center hole, then touch the Negative probe leads to the cylindrical metal shell.

You should be reading 19 Volts, or VERY close to it.

Also have an assistant gently wiggle this cable, while you are testing.
Have them wiggle the power cable TO AC adapter, also.

An intermittent reading indicates a broken wire, or wires. Discard AC adapter, obtain a good one.

http://www.thelaptoppowersupplyshop.co.uk/advent-7021

The port on the laptop that the AC adapter (Charger) plugs into, is the DC Power Jack.

AC adapter checks out it's on to the DC Power Jack.
Post in a Comment if you wish to go on with the diagnosis.

Regards,
joecoolvette

Apr 19, 2012 | Advent Computers & Internet

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