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How do I check video card and or replace in HPOmni100PC

Nothing on screen and no power led

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It is actually quite common for the video to go out on those all in one HP desktops. You will have to replace the motherboard since the video card is soldered to it.

Posted on May 06, 2015

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Posted on Jan 02, 2017

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I have an LG 47LN522-UB LED TV that stopped working after three years and need help diagnosing a problem with it.


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Apr 26, 2017 | LG Televison & Video

1 Answer

Have a Vizio E550i-B2 it powers on black screen has audio did light test and saw nothing other than black screen. I think its just LED driver card but wanted to ask before I order just that card?


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Mar 24, 2017 | Vizio Televison & Video

2 Answers

Samsung UN55EH6000 has audio, but no backlight LED as seen with flashlight test.


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Feb 29, 2016 | Samsung Electronics UN55EH6000 - 55in...

1 Answer

Imac intel will not power on


Possible failed video card. 3rd LED indicates MLB and GPU are communicating: (CAUTION! There is high voltage from the powersupply so any attempt to open iMac other than removing glass panel to see the indicators...should be done by authorized ACMT)

  • LED 1 - Indicates that the trickle voltage from the power supply is detected by the main logic board. This LED will remain ON while the iMac is connected to the AC power. The LED will remain on even when the computer has been shut down or put to sleep. The LED will turn off only if the AC power is disconnected or the power supply is faulty.
  • LED 2 - Indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly.
  • LED 3 - Indicates that the computer and the video card are communicating. This LED will be ON when the computer is communicating properly with the video card. If LEDs 1 and 2 are ON and you heard the startup sound, but LED 3 is OFF, then the video card might be installed incorrectly or need replacement.
  • LED 4 - Indicates that the computer and the LCD display panel are communicating. This LED will be ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be installed incorrectly or need replacement.

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Was watching a movie on my computer last night and all the sudden the screen started turning off and on with no picture when it was on. Has the monitor gone bad or is it a video card issue?


The simple way to check if this is a Monitor issue or not, you can unplug the monitor from the Computer and connect it only to the power outlet. If it gives you a "No signal" screen or goes through any sort of other Self test, Your monitor is fine. You can also check if the power led is blinking Amber or Green. A blinking Amber LED while the monitor is only connected to the Wall outlet indicates the monitor is faulty.

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Oct 08, 2009 | Dell E173FP 17" LCD Monitor

1 Answer

IBM Lenovo doesnt start. Fans are ok Ram and Graphics card attached with the system is ok( I checkd with another system). The led on front , the keyboard leds and cd driv leds turns on as soon as I press...


Sounds like your graphics card and display are not properly communicating. If the card doesn't sent out a signal to the display, you will see nothing on the screen. Did you check the graphics card on another machine using the same display? If so, something different may be wrong. I am assuming your display is powered on and plugged in properly. If there is more than one video connector on the machine, you may have it plugged into the inactive video connector. If all of this checks out I suspect you have some hardware problem with the system unit.

Jul 03, 2009 | IBM Lenovo ThinkCentre M55e PC Desktop

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-Orange light on Power-up button stays lit. -No Video, just black screen. using AGP Video card TNT 32mb / Model CT5823 I've replaced the battery, double checked the cables, Power supply is good. Gatew


This is typical of a failed power supply. Look on the back of the power supply, there may be a red switch for input voltage. Unplug the power cord, flip that switch a few times and then plug the cable in and try again. If nothing changes, see if there's a small black button on the back of the power supply. If there is, unplug the power cable and press the button and hold it for 10-15 seconds. If an LED flashes or turns on, then plug the cable back in and try again. If this all fails, replace the power supply.

May 17, 2009 | Gateway Computers & Internet

1 Answer

My computer won't boot up or something; no power led lit.


Seems to me your Ram module connector is dirty. Clean its edge connector with a soft eraser. Or if it can, transfer it to the next ram bank. Or your memory module is already dead.

Apr 28, 2009 | HP PSC 2410 All-In-One InkJet Printer

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All three LED's blinking, no video


hi, does the three lights blink only after u connect it to a display card??if yes then check if any of the connecter pins are damaged, or check out the display card..bye let me know

Dec 08, 2007 | Dell E173FP 17" LCD Monitor

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