monitor powers off when PC powers up

d21rich

Honorable
May 7, 2015
3
0
10,510
monitor powers off when PC switches on
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the monitor has 3 states
off - no lights
on but PC off - orange light
on and PC on - blue light
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what i'm going to describe has happened a couple of times in recent weeks.
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power on my PC, the monitor button changes from orange to blue for a few seconds but then powers off completely. the PC continues to power up.
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to get around it I have to:
1. unplug the lead from the back of the monitor and leave it unplugged for a few minutes.
2. press and hold the power button on the PC to force the power off.
3. plug the monitor back in, the switch on the front goes blue but then when it cannot find an input it goes orange as the screen goes into power saving mode.
4. wait a minute or two then power on the PC.
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sometimes this works, sometimes it doesn't
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I'm thinking that the problem is in the PC rather than the monitor because surely the monitor would either work or not.
I've unplugged and replugged all the cables including trying a new power lead.
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right now it's ok, that's how I'm inputting this.
as I said, this has happened a couple of times and occurrences can be weeks apart.
 
the monitor is about 2 years old
it's an LG FLATRON W2442PE
it's connected via HDMI

I spoke to the company I bought the PC from in 2013 and they have suggested a plan to look at why it is happening, bear in mind that it has happened maybe 3 times in the last month.

next time it happens I'm going to open the box and unplug the graphics card then boot up with the motherboard graphics.
he was suggesting that the problem could be with the GPU and I'm tending to agree.
 
no, the monitor powers off.
I think I have that plan going forward from here, now it's just a matter of waiting for it to happen again, which could take weeks to come along.
right now I'm up and running.