You will need to search sites like eBay for the power supply board.
I have a U2713Hb monitor. It's been working fine with no problems, but then one day when I powered it on, the orange LED buttons on the right side lit up in sequence to show startup, but then everything went blank and the screen never powered on. Since then, pressing any button won't do anything, and it won't turn on - no lights on the buttons or screen. When it is plugged into a wall socket though, I can hear a rapid beeping/chirping coming from the back, probably where I'd expect the power supply to be. If I unplug the socket it stops immediately. I tried doing what had been suggested on here for other posts - removed all cables, pressed the power button for 10 seconds, then plugged it back into the wall. Other than the chirping resuming, nothing happened. My assumption is that the power supply has failed, and the noise is something like a relay trying to activate and failing. But I was wondering if anyone had suggestions that I should try, or parts I should look at replacing? Seems a shame to bin it.
U2713H, won't turn on, rapid chirping