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Simple troubleshooting of CPU of desktop computers led on but no display

When you experience a led on but no display... here are some simple tips so that you will be guided easily to know what causes the problem

1. check your num lock.. click it if it turn's on and off...if not it means there is a problem in your CPU ,if it turn;s on and off your monitor is the problem...

2. open your CPU if you can.. check if there are parts that are not connected properly..

3. usually the problem of the cpu always goes in the memory or video card...
and commonly the new versions of motherboard are with built in sound card, lan card,and video card...if you dont have newer version check the following if it is in proper place..

4. if you know where is the memory of your computer..
remove it..and check if there is are some burn or if the coppers are complete...clean it and put in place properly then try to turn on again your pc.. if it works your memory is just dirty..or it is the cause of the problem

5.if not, try to check your video card.. if you have a spare of video card try to put it on and turn on your pc if nothing s happen..
you need to contact your technician because it has a serious problem...

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How to diagnose television fault?

diagnose television fault Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

How to Diagnose TV Problems


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Apr 16, 2016 | Vizio 60" E601I-A3 Full HD LED-LCD TV

1 Answer

where can i get pyramid-9 PCB No BA41-00167A manual book for setting up power switch,hdd led,reset etc connection setting ???????????

Hello, i was made a search in google, i guess you must look it too, and a don't get nothing, but, I think i've a solution for you, according my own experience, i've installed 2 kinds of different MB, and, althoug there are different brands, the connection pins are the same, ie, the front panel connector that connect HDD Led, Power Led, Reset and Power, is a 9 pin conectors (really have 10, but 1 pin is cut for reference) and commonly is called PANEL 1

Then, i guide you

2 8
. . . . this will be 2,4,6 and 8 pins (from left to right)
. . . . . this will be 1,3,5,7 and 9 pins
1 9

Power Led + in pin 2
Power Led - in pin 4
Power Button # or + in pin 6 (It's no critic the orientation, it have no polarity, is a push buttom)
Power Button GND or - in pin 8

HDD Led + in pin 1
HDD Led - in pin 3
GND from Reset Buttom in pin 5
# from Reset Buttom in pin 7

THE PIN 9 has no connection

Source: My own experience, and check this instalation manual, at 21st Page


Jan 07, 2011 | EPoX EP-3PTA Motherboard

1 Answer

My monitor only power 1 sec and next shutdown the led forever green

This is a common issue on LCD display caused by a short circuit in the inverter area. As soon the power supply detects the short circuit, it shut off the power to the display.

As user, there is nothing you can do. If you are planning to fix it (and have previous electronics repair experience) you may want to read how this type of displays can be fixed.

Do not try if you don't know anything about high voltage.

Nov 06, 2009 | NEC AccuSync LCD72VX LCD Monitor

2 Answers

Samsung Syncmaster 710n no display and no LED light

The power button should be on the FRONT BOTTOM RIGHT. and there should be a little led/light next to it. make sure everything is plugged in correctly and press the power button, the led should light up, and then boot your computer.

Let me know --
If this helped please mark this thread as FixYA

Dec 26, 2008 | Samsung 710N V2 (Ivory) 17 in. Flat Panel...

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