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How and where do the monitor wires connect to the motherboard

The power supply connector got pushed inside the computer. When I opened the computer to fix that I noticed two thin wires from the lcd, one white and one black with gold ends just hanging loose inside the computer, where are they supposed to be connected to, and what attached them?

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The two wires suppose to be the antenna's cable as 1 for Main, another Aux. The wire supposed to be attached to your wireless card, which normally situated at the bottom of the laptop. Check for any track, or hole with let the cable to be link until the wireless card.

here's some picture for your to understand,

how and where do the monitor wires connect to the  - 5431d6a.jpg

529272a.jpg

Dont forget to rank my solution... Thanks

Posted on Jan 11, 2009

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2 Answers

Won't power on


Need more info, like what happened before it did not power on or do you really mean that it powers on, but there is no display, in which case you may have to contact Acer tech support for more info.

Aug 29, 2013 | Acer America Acer Aspire V3-771G-9456...

1 Answer

On board video card is not working on A7V8X-LA motherboard


No Signal means no video signal from the computer.

Means the computer isn't sending a video signal to the monitor.

Logic would dictate that the problem is the graphics chipset.
Whether it be Integrated Graphics (OnBoard) of the motherboard, or a separate graphics card.

However there is a different culprit, and one that is often overlooked,

Power Supply

A Power Supply with a weak voltage power rail, will not have enough power to turn the Processor (CPU) on.

1) If ALL of the LED lights were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power

3) A typical Processor can use 51 to 125 Watts of power,
Just depends on what Processor it is.

This is why one may see LED's light, and possibly fans spin, but No Signal.
Not enough power to turn the Processor on.

Computer dirty inside? That just 'kills' a Power Supply.

The cooling components for a Power Supply, is the Heatsinks used inside, and a small internal fan,

http://en.wikipedia.org/wiki/Switched-mode_power_supply

Click on the photo of the exposed Power Supply, to enlarge.

Looking in-between the letters B and C, plus C and D, you see Heatsinks.

Fins arranged in block shapes, and attached to a single piece of long metal.
The Heatsinks absorb heat from whatever object they are placed against.

The thin fins of the Heatsink then radiate the heat away.
Air flow from the small internal fan, helps carry heat away from the fins of the Heatsink's.

When dirt, dust, hair, carpet deodorizer, lint,.....you name it; coats the fins of the Heatsinks, and the blades of the fan, the Power Supply overheats.

Heat = Wasted Energy

The Power Supply tries to keep up with the call for power, but eventually components inside fail, (Go bad), and the Power Supply fails.

Number one thing when diagnosing a desktop computer, is to make sure the Power Supply is good. Make sure it is putting out the correct voltages.

Power Supply is deemed to be good, THEN go on.

Next thing in the list for desktop computer failure, is the computer is dirty inside.

The Power Supply in your personal computer (PC), is an Converter.
It converts the high AC electricity from your home, or business;
(120 to 240 Volts AC, depending on country), into 3 low DC Voltages,

A) 3.3 Volts
B) 5 Volts
C) 12 Volts (ALL are DC Voltage)

In comparison two D cell flashlight batteries produce 3 Volts DC.

ALL Orange wires are 3.3 Volts
ALL Red wires are 5 Volts
ALL Yellow wires are 12 Volts

ALL Black wires are Ground wires.

A multimeter set to DC Voltage, is used to check those power rails.

OR,
Use a KNOWN to be good, Compatible power supply, for a temporary test unit.

Power is known to be good now?
Then I concur the Integrated Graphics on the motherboard may be bad.

Use a graphics card.
Using a graphics card bypasses the motherboard Integrated Graphics. Attach the monitor to the graphics card.

FOLLOW Anti-Static Procedures.

Graphics card is installed. Monitor hooked up to it. Turn the computer on.
You should get a display, albeit it is going to be a 'Fred Flintstones' looking screen.

Screen resolution won't be correct, and Color quality will probably be 8-bit.

Looks worse than a computer using Windows 95.

That's OK. You can now install the Drivers for the graphics card, because you can now at least SEE the screen.

Post back in a Comment.
Want to know about Power Supply first.

Regards,
joecoolvette

Mar 15, 2013 | HP Pavilion PC Laptops

1 Answer

Toshiba laptop pas409e-d screen is black


Step 1:
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Causes a Computer Monitor to Go Blank b> While a blank screen may be caused by a general power outage, more often it's a problem with the screen itself. It could be a loose video or power cable going to the monitor. If that's the case, you can get the screen working again and be back in business in a few minutes. b> Power Problems All the power might be off due to a bad outlet, switch, fuse, or circuit breaker. If you hear no sound coming from the computer and its power light is off, check the power connection and breaker or fuse. Video Cable Many times the cause of monitor blackouts is a loose video cable connection. This might happen if you move the monitor or the cable. The video cable runs from the back of the computer to the monitor. It has a multi-pin connector on each end and both of them screw down securely. If the screws aren't tight, either connector could become loose. If that happens, the video signal could stop suddenly and make the picture go blank. Check both ends of the connector to make sure they're firmly seated and the screws are tight. The cable itself might be bad.This is unlikely, but possible. b> Display Power The monitor must have power. If the power light isn't lit on the monitor, it may have been turned off or become unplugged. Press the power button to make sure it wasn't accidentally turned off. Make sure the monitor is plugged in. If it's connected to a power strip, check that the power strip is on. If that checks out, unplug the monitor and try a different outlet. Power strip sockets can sometimes fail. Flat-screen monitors may have a power-brick-style adapter. It, too, has connectors. Follow the power cable from the monitor's power plug back to the monitor. About halfway up you'll find a thick rectangular plastic brick. The power goes into a modular-style equipment socket. This can become loose. Follow the wire the rest of the way to the monitor. It connects to the back of the screen with a small round plug. Check that it's firmly plugged in. If everything's plugged in right and the power light on the monitor's still off, the power brick might be bad. b> Video Card Some computers have a separate video card inside. It may come loose and cause a blank screen. If this is the case, open the computer and inspect the video card. Sometimes removing and reseating the card will fix the problem. If it has to be replaced, most video cards are not expensive.
b>

Feb 15, 2013 | PC Laptops

1 Answer

My acer monitor come on and screen go blank


Step 1:
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules Only work inside the computer case when the power has been switched off and disconnected. Never open the power source. Some of the below steps recommend removing physical parts within the computer. While in the computer it is highly recommend that you be aware of ESD and its potential hazards Causes a Computer Monitor to Go Blank b> While a blank screen may be caused by a general power outage, more often it's a problem with the screen itself. It could be a loose video or power cable going to the monitor. If that's the case, you can get the screen working again and be back in business in a few minutes. b> Power Problems All the power might be off due to a bad outlet, switch, fuse, or circuit breaker. If you hear no sound coming from the computer and its power light is off, check the power connection and breaker or fuse. Video Cable Many times the cause of monitor blackouts is a loose video cable connection. This might happen if you move the monitor or the cable. The video cable runs from the back of the computer to the monitor. It has a multi-pin connector on each end and both of them screw down securely. If the screws aren't tight, either connector could become loose. If that happens, the video signal could stop suddenly and make the picture go blank. Check both ends of the connector to make sure they're firmly seated and the screws are tight. The cable itself might be bad.This is unlikely, but possible. b> Display Power The monitor must have power. If the power light isn't lit on the monitor, it may have been turned off or become unplugged. Press the power button to make sure it wasn't accidentally turned off. Make sure the monitor is plugged in. If it's connected to a power strip, check that the power strip is on. If that checks out, unplug the monitor and try a different outlet. Power strip sockets can sometimes fail. Flat-screen monitors may have a power-brick-style adapter. It, too, has connectors. Follow the power cable from the monitor's power plug back to the monitor. About halfway up you'll find a thick rectangular plastic brick. The power goes into a modular-style equipment socket. This can become loose. Follow the wire the rest of the way to the monitor. It connects to the back of the screen with a small round plug. Check that it's firmly plugged in. If everything's plugged in right and the power light on the monitor's still off, the power brick might be bad. b> Video Card Some computers have a separate video card inside. It may come loose and cause a blank screen. If this is the case, open the computer and inspect the video card. Sometimes removing and reseating the card will fix the problem. If it has to be replaced, most video cards are not expensive.

Feb 15, 2013 | Acer PC Laptops

1 Answer

Laptop all whit screen


Dell Inspiron 1420 Notebook PC?

The white screen can be fixed. How?

Connect a VGA monitor to the laptop. Connect to the VGA port on the right rear. Example of a VGA Cable, and VGA connector,

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

You can use a CRT type monitor, (Looks like a small TV), or a flat LCD screen monitor that has a VGA cable.
By default the display should show on the external VGA monitor.

No?
Press, and hold the Fn key down, and at the same time tap the F8 key ONCE.
Still no?
There are at least 3 display options available;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external VGA monitor
3) External VGA monitor ONLY

Hold the Fn key down again, and tap once more on the F8 key.

No display on the external VGA monitor, means you have a bad graphics chipset. Replace motherboard.
Display does show on the external VGA monitor, means you have a problem with;

1) Video Cable
or
2) Screen Inverter
or
3) LCD screen

Video Cable:
The Display Panel Cable (Video Cable for Dell), connects to the motherboard by the left Hinge.
Goes under the left Hinge, and up into the Display Assembly.
It then connects to the Screen Inverter, and to the back of the Display Panel. (LCD screen for Dell)

From normal opening, and closing of the laptop, the Display Panel Cable may become pinched in the left Hinge.
This can cause;
A) The connection at the motherboard to come loose
B) The connection at the back of the Display Panel to come loose
C) Stretch the wires inside the Display Panel Cable's sheath, and damage the wires. (Break)

If you are lucky just the connection at the motherboard, and/or connection at the back of the Display panel, may have come loose.

Diagnoses is to NOT just look at the connections, but physically push the connectors of the Display Panel Cable, into the connector at the motherboard, AND back of the Display Panel.

Visually inspect the Display Panel Cable's sheath. Do you see any outward appearance of damage? This means the tiny wires inside may be damaged.
Replace the Display Panel Cable.

Remove ALL power. Remove the AC adapter (Charger), and Battery.
Remove the Keyboard Cover.

Unfasten the Keyboard, LEAVING the Keyboard Cable ATTACHED to the motherboard. Roll the Keyboard over, and lay it upside down on the Palm Rest Cover,

http://support.dell.com/support/edocs/systems/ins1420/en/SM/display.htm#wp1129771

[ NOTE*
Two Philips head screws at top of Keyboard. After removing, lift the top of the Keyboard up a little, slide it a LITTLE towards the Display Panel.
DO NOT lift it straight up at first.
There are 3 plastic tabs on the bottom of the Keyboard, that slide into the Palm Rest Cover. If you pick it straight up you will break those tabs off ]

In Removing the Display Assembly, note where number 1 points to.
This is the Display Panel Cable's connection, TO the motherboard.

Note where number 2 points to. Those cables going to the Mini-Card Antenna, HAVE to be reconnected, right back to the SAME terminals on the Mini-Card. Make a mark on the cables, and matching marks on the Mini-Card.

Use the instructions in Removing the Display Bezel.
Use the instructions in Removing the Display Panel.

View the last illustration in Removing the Display Panel.
Note how the Display Panel Cable attaches to the Display Panel, and Screen Inverter

Number 2 points to the connection at the back of the Display Panel
Number 6 points to the connection to the Screen Inverter
The Black connector that is not numbered at the bottom, is the motherboard connector of the Display Panel Cable.

This is a better view of the screen Inverter,

http://www.ebay.com/itm/Dell-Inspiron-1420-1421-LCD-Inverter-Backlight-Combo-/370274752470

Display Panel Cable checks out? Look at the screen Inverter. This small circuit board is located at the bottom of the Display Panel, and behind the Display Bezel. Closer look at link listed above.

Is the cable coming from the Display Panel Cable, plugged in tightly to it?
Does the screen Inverter look damaged?

Post back in a Comment, and we will go from there.
Regards,
joecoolvette

Jun 09, 2012 | Dell Inspiron 1420 Laptop

2 Answers

How to fix blank screen on dell laptop


If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

Jun 09, 2012 | Dell INSPIRON 6000 CENTRINO...

1 Answer

Can't get my hp pavilion a 1340 n to power up even after I tried a different power cable


See if the problem is the Power On switch, or the Power Supply.
Bypass the Power On switch.

If the computer (Power Supply) comes on, you have a bad Power On switch.
If the computer (Power Supply) does NOT come on, you have a bad Power Supply.

The ECS RC-410M motherboard uses a 24-pin ATX main power cable.
(Elitegroup Computer Systems)

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00590356&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=1818054

Scroll down the page to the motherboard illustration and photo.
On the right side is ATXPWR1.
(To the right of the Ram Memory slots, DIMM 1 and DIMM 2)

This is the 24-pin ATX main power cable connector on the motherboard.
In the photo it's above the blue IDE1 connector, and to the right of the black Ram Memory slots.

This is a general example of a 24-pin ATX main power cable, and it's respective connector on the motherboard,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The BACK of the connector is where the wires go in, as shown in the photo to the far right.
The FRONT of the connector is shown in the middle photo.

With the computer plugged into power, and the ATX main power cable plugged into the motherboard, as shown in the far right photo, a jumper wire is used to touch the Green wire, and ANY Black wire.

The Green wire is the Soft Power On wire. Abbreviated as PS_ON.
ANY Black wire is a Ground wire.

The preferred jumper wire used is a paper clip. The paper clip is straightened out, then bent into a U-shape.
The top of the U is wrapped with black electrical tape for your fingers. (And thumb)

One 'leg' of the paper clip goes down into the socket hole with the Green wire.
The other 'leg' goes down into a socket hole with ANY Black wire.

The leg of the paper clip is inserted down into the socket hole, RIGHT NEXT TO THE EXISTING wire in the socket hole.
The diameter size of the paper clip allows this.

Looking at the middle photo you see metal contact sockets. These are female terminal contacts. They resemble tubes.

The wire's insulation goes pretty far down into the back of the connector. This means the leg of the paper clip needs to go far enough down in the socket hole, to ensure that it touches the metal terminal end.

Touch briefly. No more than 2 seconds.

There may, or may not, be a spark made when the jumper wire makes contact.
The voltage is 5 Volts DC.
In comparison two D cell flashlight batteries produce 3 Volts DC.

The plastic Power On button assembly has an ATX power on switch inside it.
A momentary contact switch.

This is one example of an ATX Power On switch,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The Power Supply is just the usual ATX style. Maximum rated wattage is 300 Watts.
Actual maximum wattage is probably more like 70 percent of that.
210 Watts.

{Note*
A computer only uses the power it needs, and NO more.
If the computer only needs 100 Watts for what it is doing, it ONLY uses 100 Watts.
(Surfing the internet, for example)


If you get a good deal on an ATX power supply with more than 300 Watts, get it.
It will not hurt the computer.
Always purchase a Power Supply that has at least 10 percent more power than needed }

For additional questions please post in a Comment.

Regards,
joecoolvette

Oct 01, 2011 | PC Laptops

1 Answer

Gateway mx6448 Notebook will not power on, Red LED flashes 4 times when power on button is pressed then nothing happens. It is the same with only the battery. LED will not flash if I have only the power...


There can be many things associated with no power to the computer.
  • The outlet into which the computer is plugged may be inoperative.

  • The surge protector you are using may be inoperative.

  • The power cable may be loose or damaged.

  • An internal device may be damaged.

  • The power supply may be inoperative.

Basic Troubleshooting Power to the Computer
There may not be a consistent flow of power to the computer.
  1. Verify that the outlet into which you are plugging the computer is operational.

  2. If you have the computer plugged into a surge protector, plug it directly into the outlet.

  3. Verify that the power cable is plugged securely into the back of the computer.

  4. If you have a monitor with a removable power cord, swap the power cords between the monitor and the computer.

Note: If you recently added a new hardware device prior to experiencing the no power issue, turn off the computer and remove the newly added hardware. If there is still no power, reseat all the other cards and cables in the computer to verify that all other devices are seated securely.
Resolving Power Supply Issues
  • External Device Conflicts
  • There may be an external device causing the computer not to turn on properly.

    1. Before continuing, verify your computer is turned off.

    2. After you have established that adequate electricity is going to your computer, verify that the voltage switch on the back of the power supply is set correctly. The small red switch is to be set to the 115-volt setting.

    3. Remove all external devices except the monitor and turn on the computer. If the fan on the back of the computer now spins, turn off the computer. Plug in the external devices one at a time and turn on the computer after each device is added.

    4. Note: If you removed all external components and the fan on the back of the computer does not spin, the problem is with something inside the computer.

  • Internal Device Conflicts
  • This helps determine if the issue is a damaged or badly seated component.

    1. Verify that the computer is turned off.

    2. Remove the case from the computer.

    3. Remove all the red, yellow, and black power connectors from each floppy disk drive, CD-ROM drive, and tape backup unit that is in the computer. The only devices connected to the power supply are your hard disk drive and motherboard.

    4. Turn on the computer and verify that the fan on the back of the computer spins. If it does not spin, turn off the computer.

    5. Remove the power connection from the hard disk drive and reconnect power to one floppy disk drive. Turn on the computer and verify that the fan on the back of the computer spins.

    6. Reseat the power connection from the power supply to the motherboard. Turn on the computer and verify that the fan on the back of the computer spins. If the power has been restored, turn off the computer and reconnect the power connections to the devices. Test the computer for power after reconnecting each device.

  • Power Switch
  • The power switch may not be functioning properly.

    1. You may need to open the case and readjust the power switch.

    2. Locate the control panel inside the computer and remove any screws holding it in place.

    3. Turn on the computer with the control panel removed by pressing the button on the control panel that corresponds to the power button. If the power supply fan spins and/or the computer turns on, put the control panel back in its place. Try to turn on the computer again.

  • Test Switch and Diagnostic LED
  • Note: Not all power supplies have a test switch and diagnostic LED.
    Certain power supplies have a test switch and LED to help better troubleshoot the device. The green LED is always on when the computer is powered on. If the computer is not receiving power please perform the diagnostic test below.

    1. Verify that the computer is turned off.
    2. Remove the case from the computer.
    3. Remove all of the red, yellow, and black power connectors from each floppy disk drive and ROM drive and the tape backup unit (TBU) that is in the computer. Remove all power connectors from the motherboard. The only device that needs to be connected to the power supply is the hard disk drive.
    4. Press and hold the test switch for five seconds on the power supply, and then verify that the green light on the power supply comes on.
    5. If the light comes on:
      1. The power supply is good and something that was plugged into the power supply is causing the computer to not turn on.
      2. Plug devices in one at a time, testing with the test switch between each device to determine what is causing the power issue.
      3. If all devices are plugged in and the light is working, the connections may have needed to be reseated, or it is possibly a power switch issue.
      4. Go to the power switch section of the power supply checklist for additional troubleshooting steps.

    6. If the light does not come on:
      1. Disconnect the power from the hard disk drive, and then plug in power to the CD-ROM drive and determine whether the light comes on.
      2. If it does, follow the preceding information - "If the light comes on."
      3. If the light still does not come on, contact Gateway Technical Support.

    7. Confirm that power from the power supply is connected to the motherboard. Remove all cards and cables from the motherboard, and press and hold the test switch for five seconds on the power supply and determine whether the green light-emitting diode (LED) comes on.
    8. If the LED comes on, put the devices back in one at a time, testing between each device to determine what is causing the issue.



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Dec 02, 2010 | Gateway MX6448 Notebook

1 Answer

I have a hp pavilion dv7 and the power socket has come a lose i need to know which wire goes where.....


The DC Power Jack that the AC adapter (Charger) plugs into?

Look into the DC Power Jack with a magnifying glass and light you'll see it's a center pin surrounded by a barrel. Barrel has an inside and an outside.


1) Center pin. Gold and buried down in the plastic. Connected to WHITE wire at motherboard connector.

2) Inside barrel has 4 Brass fingers.
Orient the laptop so the LED is at 12 o'clock and you'll see fingers at 12, 3, 6 and 9 o'clock.

These fingers carry the + 19 volt power to computer.
The ones at 6 and 9 o'clock do, Noon and 3 are not connected.
+19 Volt power arrives at motherboard connector on RED wire.

3. Outside barrel has six brass fingers, at 2, 3, 4, 8, 9 and 10 o'clock.
2, 3, and 4 are not used,
2, 8, 9 and 10 are the power return (common, or ground) to computer.
It arrives at motherboard on BLACK wire.

4. LED is connected to YELLOW wire and controlled by computer.
Other side of LED is jumpered to a Black wire,(Ground), outside barrel 8, 9, and 10 o'clock.

From > analog posted in an HP Support Forum.

Nov 12, 2010 | HP Pavilion dv1000 Notebook

1 Answer

Power Issue


sounds suspiciosly like your chord fitting is damaged(loose wires at connection)and shorting.if possible try a friends power supply with same connecter type before renewing cos could be faulty(loose)connection at pc(inside)constant pushing and pulling of connections often causes 1. loose split or disconnected wires at male connection or 2.loose pins on motherboard female connection or broken housing (not difficult to repair)more difficult to find out how to get to internal connection.

Mar 04, 2008 | Toshiba Satellite M65-S9092 Notebook

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