When it's turned on, the light on my monitor doesnt show any signal of power supply
When it's turned on, the light on my monitor doesnt show any signal of power supply.
please help me in rectifying the problem. which parts inside sould I look for cause?
thanks & regards,
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Re: When it's turned on, the light on my monitor doesnt...
I'm assuming that you mean the green indicator light is not on. This could be caused by a host of problems. Assuming that you know the AC receptacle is live by testing with a standard light the next step would be to unplug the unit and remove the back. Check the fuse for continuity. If the fuse is good you have a problem with the power supply or a short which is keeping the power supply from powering up. The most likely culprit is the Horizontal Output Transistor. Unless you are an electronic tech and know how to check this you probably need to take the unit to a shop for further diagnostics and repair.
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This is a very common problem with this model after a few years of use. This problem is caused by a failure of the capacitors in the power supply board hat powers up the back lights in the monitor. When the back lights don't power up you get no display on the screen. Here is a link to a repair guide for that model that shows how to open the unit and what to look for and replace to repair the monitor.
LED lights light, fans spin, but NO Signal on monitor.
No Video Signal, because the computer isn't sending one out. Because the computer isn't working.
1) If ALL the LED's 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 from 51 to 125 Watts of power. Just depends on what Processor it is.
A Power Supply with a weak voltage power rail, will not have enough power to turn the Processor on.
However not to jump the diagnostic flow chart; check the monitor cable FIRST. Use on another known to be working computer. If it checks out OK, the problem is the computer, and I think -> Power Supply.
Test the 3 main voltages on the Power Supply, with a multimeter set to DC Voltage; OR use a KNOWN to be good, Compatible power supply, for a test unit.
For additional questions please post in a Comment. Regards, joecoolvette
Your unit has a power supply that has failed. When the power board starts failing you may get a wavy display, it may be slow to show a picture or you may just get the flashing power button light that you have. The problems are caused by parts called capacitors that have bulged and failed. Here is a link to a repair guide for the LG L226 that uses the same power supply board as your unit.
If the signal cable is detachable from the monitor, you could try with another cable...
Regarding the power, I' not an expert, but if you're familiar with electronics basics, like risks of high voltage, soldering, etc, and you'd like to experiment with the unit, then I can give you some hints.
I would suggest 2 things. Open the PC up and reseat the RAM stick/s. Also reseat the graphics card if applicable. If the monitor still doesnt get sync take out the pci cards and see if it will POST. If so plug your PCI cards back in one at a time to diagnose which is the faulty one. Also it could be your graphics card, take it out and use the O/B graphics see if the monitor will get sync off the O/B. If this doesnt help please supply more information.