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All leds light on panel - HP LaserJet 1300 Printer

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If all lights are on and solid, it might be as good as dead.
If all lights are blinking, check the RAM.

Posted on Nov 17, 2009

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Posted on Jan 02, 2017

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No picture only sound.


Engineers are right, you need a new LED panel., or the component that supplies the light to the screen.

Mar 18, 2016 | Philips 55pfl4706df7 4000 Series Lcd...

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Model 47LN541C. What caused backlight to fail?


Probably the fault is with the led array behind the panel. 47ln541c has direct led lighting than the sided led lighting. Normally the led driver () in an led tv will there integrated to the power supply. As you says that you have replaced that to then there is problem with the led array . I think it would be difficult get the part outside.
check the image to understand how the leds are mounded behind the panel

25874529-dzotwpalf3shxv3oeloa4124-5-0.jpg
http://electro-medical.blogspot.com/

Sep 21, 2015 | LG Televison & Video

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On my GE Profile Microwave the led is lighted and shows the time correctly and displays the led buttons. When I press on the led buttons nothing seems to happen. Also, after some idle time, the led panel...


The touch panel has malfunctioned, Suggest replacing microwave unless you want to attempt repair. If so you will need a replacement touch panel for it.

Jun 14, 2017 | GE Microwave Ovens

2 Answers

Front panel connections


I don't find the Front Panel header pinout online, nor do I have an MSI MS-5191 in the shop.

I would suggest using one the LED lights with two wires.
(3-wire is a dual color LED)

There are two rows of pins. Usually the Power On switch, Power On LED, and Speaker; are on the same row.
HarDDrive activity LED, and Reset Switch are on the opposite row.

Speaker has 4-pins designated for it. All the others use 2-pins.
(Unless the PWR ON LED is a dual color jobbie)

Touch two pins next to each other, in the same row; with the 2-wire LED.
Start with finding the Power On switch first.

Usually the top row 1st two pins are Power On LED (Light)
Next in line are the 2 pins for the Power On switch.
Bottom row 1st two pins are usually HarDDrive activity LED (light)
Next 2-pins are usually Reset switch.

May not apply to a motherboard old enough to use a Socket 7 processor socket.
There may be 18 to 20-pins.
Bear in mind that many are not used, and probably 4 are for an internal speaker, for hearing BIOS Beep Codes.
May be two separate Front Panel headers.

Once you find the two contact pins in the Front Panel header, for the Power On switch; I would put the Power On switch wires on.
The small pin connector on the wire/s, will keep you from accidentally touching these two pins again, when the computer is on.

Now you have the two pins for the Power On switch, and the computer is running; then keep touching 2-pins at a time with the LED. (Light Emitting Diode)

LED stays on? You have the Power On LED (Light) pins.
LED blinks? HarDDrive activity LED (light) pins.
Computer restarts? Reset switch pins.

Look for abbreviations near the pins in the Front panel header.

PWR, Pwr, Pwr On, Sw, and SW; are just some of the abbreviations for the Power On switch.

HDD LED, and HDD are two for the HarDDrive activity LED. (Light)
(If it states HDD SW it is the Power On switch. Weird old way of marking)

RST, Reset, and RSW, are for the Reset Switch.
(Reset Button)

If you see 4 pins marked with a bracket ( [ -> Turn so it's horizontal), these are for the internal speaker.

Type MSI front panel connector in your search bar, and look at -> images. See if you can find an image of your MSI Front Panel header pinout.

You can bet MSI carried out that Front Panel header pinout, on other MSI motherboards, besides the MS-5191.

The MSI MS-5191 may have been a motherboard made by MSI, especially for a pre-built computer manufacturer, and not listed on their website as an OEM motherboard.
(Original Equipment Manufacturer)

Won't have the Front Panel header pinout, listed on MSI's support website. (Doesn't)
But you can bet there IS an OEM motherboard made by MSI, that the Front Panel header DOES match.

May be different expansion slots, or motherboard chipset, or whatever; but the same Front Panel header pinout.

Regards,
joecoolvette

Jan 05, 2013 | AMD MicroStar MS-5191 Socket 7 mATX...

1 Answer

Mercury Motherboard PI845GLM-L manual needed for wire connections... please help me


If my information is correct;

Orient the motherboard so that we are both looking at it in the same direction,
Processor to the top, Ram Memory slots to the right, white PCI slots to the bottom.

The front plastic panel of your computer that has the Power On button, Harddrive activity LED light, and Power On LED light, is the Front Panel.

The area of pins on the motherboard, that the wires from the Front Panel go to, is the Front Panel header.

The Front Panel header is all the way down on the right corner. Panel 1.

The Front Panel header, or Panel 1, is a rectangular block that is positioned lengthwise, across the bottom of the motherboard.

There are 4 pins across the Top, and 5 pins across the Bottom.

The pins are numbered.
They are numbered Even across the Top row.
Pins 2, 4, 6, and 8. (There is NO Pin 10. Just a blank spot)

They are numbered Odd across the Bottom row.
Pins 1, 3, 5, 7, and 9.

A) Pins 1 and 3 are for the HarDDrive activity LED light. (HDD LED)
Pin 1 is for the Positive wire. ( + )
{ Pin 2 is for the Negative wire. ( - ) }

If the LED light is dim when operating, turn the wires around.

B) Pins 5 and 7 are for a Reset switch, (Reset button), IF a Reset switch is used.
Pin 5 is for the Negative wire

C) Pin 9 is RVSD_DNU
Reserved Do Not Use.

D) Pins 2 and 4 are for the Power On LED light.
Pin 2 is for the Positive ( + ) wire.

If the LED light is dim turn the wires around.

E) Pins 6 and 8 are for the Power On switch.

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 16, 2011 | Mercury P4VM800M7 Motherboard

1 Answer

IBM xseries eserver x236 Bios problem: a yellow light( !) like this is on and IBM server can not start


Hello,

Try this:

Light path diagnostics

Many errors are first indicated by the illumination of the system-error light in the operator information panel on the front of the server. One or more lights inside the server might also be lit that can direct you to the source of the error. The system information LED lights to alert you that there might be important information recorded in the system-error log. 2. Removing the left-side cover and look at the light panel. These LEDs indicate the type of error that has occurred.3. Once you know the general type of error and the general location of the component involved, the next step is to check the system service label on the outside of the server. This label gives an overview of internal components that correspond to many of the LEDs on the light path diagnostics panel and can help to view lit LEDs inside the server. Note: Some of the LEDs on the light path diagnostics panel will not have a corresponding LED lit on the system board.

Good Luck
C2Solutions

Dec 31, 2010 | IBM eServer xSeries 236

1 Answer

LED light on the control panel for Cycle Complete does not light


its a neon lamp which glows very dim at times..As long as rest is ok i would leave...

Oct 01, 2009 | Whirlpool Duet GHW9150P Front Load Washer

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