Epson Stylus Photo R1800 Power Problem

Hello and thank you for letting me join the forum.

I have an Epson Stylus Photo R1800 printer, that is probably 12 years old. It prints photographs beautifully, when used with paper profiles and set up properly via Lightroom, so I would not want to change.

However, there is a problem with the power supply. It often will not start up when the power button is pressed. Sometimes, if I leave it for an hour, the on/off light will come on. Sometimes if I move the printer very slightly - a gentle push on it - it starts up after being completely "dead". Sometimes, the ink buttons will flash wildly, and not stop until I push the printer.

It's almost as if there's a loose wire at the power connection end, but I doubt it's as simple as that. I've bought new power cords, but although it started up the first time a new lead was attached, it's now gone back to it's old was of needing a gentle nudge!

All suggestions are welcome. Thanks.

Stephen