Acer ES1 511 laptop won't boot

We have an Acer ES1 511 laptop that has recently stopped booting. It is plugged in and when we press the power button the blue power-light indicator comes on, then there is a brief fan spool-up for about 2 seconds, then the power goes off. This will repeat about every 5 seconds indefinitely. There is also a very very faint flash on the screen like it's attempting to start the screen but nothing more.

I have removed the battery and tried on A/C alone, and I have also tried resetting the battery using the pinhole on the bottom.

Any ideas as to what might be wrong, or other things to try are appreciated.

Thanks