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To help you troubleshoot the issue, please follow the instructions mentioned below,
-Make sure monitor power cords are correctly connected to the power switch and connectors.
-Check if monitor VGA cable is connected properly from the monitor to the computer connector.
-Make sure Power button is switched ON.
If issue persists, please try to replace the Power cord and VGA cable if feasible.
If issue persists, it is recommended to contact your monitor manufacturer for further assistance.
I found out today that it will require a new board. The connector for the moniter has been bumped or hit at some point and has a broken pin going into the front of the board. It probably could be repaired but it would require removal of the connector and also removal of the one above it.
Is the cord broken in the computer, or the monitor or the pin broken and stuck in the machine? If it is in a desktop it goes into the power supply. Which you can change the whole power supply fairly cheap. that is if it in a desk top computer. 4 screws, 4 or 5 connectors and ta da new power supply, All you need is readings off power supply such as wattage. Good luck
Check for internal fuse on power module, you will have to open the case. Make sure power cord is removed. Be carefull capacitors tend to hold a charge long after power is removed. I have a LP640 ....big brother to this one. If you open the case the warranty is voided so think about it first. the fuse could be on the circuit board and will look like a small solid green resistor or it could be a full sized fuse in-line with the wires coming from the power cord connector. I have seen the inside of a LP390 with the fuse behind the power inlet connector. Good Luck
Well now if you go asking shop folk for this -they wont use their imagination, just in case they get it wrong and you sue.
Just be sure that the voltage you need is - what it is - 12V did you say
Then go the the electrical isles small items and you will see usually in a bubble pack on the rack a power supply- with a strip of various connectors.
The power supply will have a slider switch to select vorltages from 1.5-3-4.5-6-7.5-9-12 volts.
These will also have a coloured patch.
The connectors are also coloured on the tip.
Pick the connector colour that matched the voltage colour- plug in into the cord and lug it into the monitor .
And it does not work Huh!
Then unplug the connector from the cord and turn it around plug it in- then it it will work.
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