Monitor off but PC is on, do I need a new monitor?

I have a Lenovo H430 and a Sony ViewSonic VX1962wm. The monitor I've had for around 5+ years.

Since yesterday, when I turn on my computer. The monitor is on stand by while the computer is running. Only recently my monitor was completely off but my computer running. I've checked everything and it seems fine, however the monitor continues to display nothing. The power button light is off completely. When I plugged my computer into the TV however, everything seems to be fine and displaying correctly on the TV. I checked everything again and my graphics card, RAM ect ect work fine.

Does this mean I need a new monitor? If so, where is a cheap place to buy it within a short period of time. The best result meaning getting it within the same day this issue occurred.

Note: It doesn't give me a "no signal" message. It's just all off, 100%

Check the fuse in the plug and that the power cable is firmly pushed into the monitor, if necessary test with a replacement cable
If still no better assume the monitor is dead - they are not worth repairing. In the UK online is the cheapest place, if you want off the shelf PC World, Argos or staples but will cost more
HTH
David