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My Monitor will not turn on


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#1 joannawongx

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Posted 21 January 2015 - 02:30 PM

I have a AOC computer monitor which will not turn on. I have checked that all the wires are plugged in correctly but it still doesn't seem to work. When I press the power button on the computer it comes but the screen just stays black. 

 

Could someone help me please

 

Thank you 



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#2 Chris Cosgrove

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Posted 22 January 2015 - 08:21 PM

First of all - welcome to BC !

 

Really silly - Have you checked the fuse in the plug ?  Much less silly - I am not familiar with the details of these monitors - have you checked for an internal fuse ?  Unplug the monitor from everything, especially mains electricity, and turn it over and see if there is a fairly readily removable panel on the back of it, possible four Philips screws, if there is an internal fuse it will be hiding behind this.

 

If you do this be very careful of what you touch, there can be quite high voltages inside the casing even with the power disconnected.

 

Beyond these checks what you do depends on how old the monitor is. Less than a year, talk to your supplier about the problem and a warranty claim. More than a year, it might still be worth talking to your supplier but you are probably looking at a repair at your cost or replacing it.

 

Chris Cosgrove



#3 Platypus

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Posted 22 January 2015 - 08:49 PM

When I press the power button on the computer it comes but the screen just stays black. 

Do you hear confirmation the computer has booted (usually a BIOS single "success" beep)?

 

Does a power indicator lamp show on the monitor?

 

If the monitor has an independent mains connection (mains is supplied from a wall outlet, not a socket on the computer), will the monitor power up from its own power button?

 

If the computer beeps (normal boot up) and continues to load Windows (hard drive activity and startup sound), but there is no power indication on the monitor, or the monitor does not start up and show a splash screen/no input indication when you press its power button, the monitor itself is faulty, and as Chris has suggested, you can diagnose things like blown fuse.

 

If the computer does not confirm boot-up, and the monitor shows a power light but the screen remains black, this suggests the computer has developed a hardware fault.

 

If the computer beeps, continues to load Windows, there is a power indication on the monitor but the screen remains black, it may be the backlighting on the monitor has failed. If this happens, you can normally make out a faint screen image if you darken the room and hold a torch against the screen.


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#4 claryfray

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Posted 23 January 2015 - 01:08 PM

I'm having the same problem, and it would be really great if someone could help. Computer boots normally(from what I can hear) - no beeps. Power button lights up, LG logo appears, and then the screen returns to black like I've never even push the power button at all. All LED lights including power button are on though.

#5 Platypus

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Posted 23 January 2015 - 07:30 PM

There's little distinction between brands of monitor in faults and diagnosis, so what has already been said applies. If a monitor shows the splash screen, then instead of the desktop or some type of "No Input" indication, the screen just goes black, you'd expect a backlight fault.


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