could be a power supply in the pc died and then it probably took out
the video card. It could be spike in power source took out the
PC or components.
morel hear is prove it. What have you done to confirm it is the
monitor have you connected a monitor that works to it like a old one
that a friend has does not use it. As it stands not enough data
to tell what the problem is.
could be like a friend of mine He unplugged his PC from the box from
the electric outlet to protect it from the thunderstorm and left the
modem plugged in and the lighting came through and destroyed the
whole system so he had to have a new box built which meant a new
motherboard CPU memory hard drive DVD/CD drive power supply.
I just had the thought you could be talking about a TV and a cable company black box in which cause it could be you need to take the remote and change the input.
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