The olevia tv won't turn on. The blue light is on indicating it has power. Not sure if we hit a wrong button on the remote and now it wont turn on

Try unplugging and replugging after waiting.

dead power board

Do you mean that the source button on the TV itself does not switch to the input of the TV that you are connected to?

my olevia a 232 s12 2nd hand tv . gift from a relative wont power on .just had the blue light on.i was able to reset my 32 inch olevia by pressing and holding down the power button much like a computer to reboot.might work for you.

power supply board is damaged,only working with standby power

The issue you are having is your power supply

Thank you

www.orlandolcd.com

Sounds like the power supply.

My classroom TV seems to be stuck in standby mode. Blue light is on but TV won't turn on either by push button or remote.